Official "custom" exhaust thread, for all engines Options

[GotToyota]

Since there is an exhaust thread pretty much every other day, I thought it would be good to make one for those looking to make their own custom exhaust. Many people tend to go this way because the aftermarket systems for our cars are becoming more and more difficult to find. Let's begin?

What size piping would be best for my GT/ST//GT4/etc?
This question really depends on your goals for the car, and what you do with it. My typical rule of thumb that has worked best for me, is 2.5" and below for N/A vehicles, and 3"-3.5" for turbo'd vehicles. The bigger the piping on an N/A, the more bottom end you will lose, however, you will gain better top end. Find your trade off point.

What about mufflers?
This is where it gets interesting. The muffler you use will determine how your car sounds. There are many different ones out there, and different types. You can have the traditional canisters, which you see mainly in the tuner scene, then there's the Magnaflow/Flowmaster type. Here are pictures showing each:

Canister:


Flowmaster/Magnaflow:


The difference in these mufflers comes from inside. Quality mufflers will have better construction and better quality inside baffling, which will bring out nice sound from your exhaust. Cheap mufflers like the ones you see on Ebay will use sound metallic and tacky. My personal recommendation if you choose to get a canister would be either the Megan Racing N1 replica ($70-$80 on Ebay), or the OBX B10 ($50-$60 on Ebay).

How do I get the piping?
Now here comes the fun part. After you've purchased your muffler and decided on your piping size, you get the piping itself. You can buy DIY exhaust kits online, which are fine if you know how to weld, but otherwise I recommend going to a local exhaust shop. From here, you can tell them what you're wanting out of your exhaust system, plus you can customize your muffler placement/angle, as well as the design of the piping, so that you can get the most straight piping possible for your setup. I paid $130 for 2.5" piping on my Supra, this included the piping itself, a resonator, and the labor to put everything on. You will want to get piping from the cat to the back of the car. Basically they cut the piping off from where it runs into your cat, and then weld on bigger piping. Many exhaust shops will NOT condone the removing of your cat, nor do I condone it. This brings problems with emissions, as well as state inspections, not to mention your car will sound like crap. I highly recommend getting a resonator added in with your piping to ensure a better sounding exhaust, you'll be glad you did it.

Here is my final result with my Supra:









I hope this will give you guys a better understanding on what to look for and get when wanting to get an exhaust system.

-Matt

This post has been edited by GotToyota: Aug 26, 2008 - 9:44 PM

[KAOS]

Awesome write up Matt - thank you!

[elastikman]

Niceee post!

Dont forget the Greedy (or replicas like OBX) SP2 muffler used by many owners 6gc!



Some blabla...

The GReddy SP2 Catback Exhaust Systems are 2nd-generation exhaust systems based on GReddy's famous SP catback system series. The GReddy SP2 (Street Performance) Catback Exhaust system continues GReddy's tradition of high-quality performance exhaust systems.

Through customer feedback, GReddy redesigned the SP2 catback exhaust as a full stainless steel catback exhaust system that is similarly priced to the original GReddy SP exhaust system. The new GReddy SP2 catback exhaust features a SUS304 stainless steel muffler canister with extra strong SUS430 stainless-steel end caps that feature a deep, high polish. Manufactured using state-of-the-art robotic seam welding, the single-wall canister of each GReddy SP2 catback exhaust features increased rigidity for maximum durability and life. The new GReddy SP2 catback exhaust system also features thick walled (1.5mm), polished SUS304 stainless steel mandrel bent piping for better resonance and vibration control and enhanced corrosion resistance and durability. New lightweight, flared and stamped stainless steel flanges are also used to provide improved sealing characteristics. With over 35 types of internal perforated tubes, each GReddy SP2 catback exhaust system is specifically tuned for the best combination of sound and performance.

The large, high volume GReddy SP2 exhaust muffler provides maximum exhaust flow with a deep, pleasing tone. The GReddy SP2 catback exhaust is especially effective when used on vehicles with an aftermarket turbocharger system.
The unique outer-curled oval exhaust tip is embossed with the famous GReddy logo.
Most GReddy SP2 exhaust systems are complete catback units, which do not effect emission related hardware. Each GReddy SP2 catback exhaust system is designed for a specific car application and can be bolted on out of the box, using factory mounting hangers.

This post has been edited by elastikman: Aug 20, 2008 - 7:48 PM

[GotToyota]

Let's get this stickied!

[Spider77]

Yeah, you got a point. Everyday I see some question about exhaust in regards to piping size and mufflers. It would be nice to have a reference so people can just go right to it.

[Athorn]

I just got the obx muffler put on last week. I did not get larger piping from the catback because it sounds exactly like the stock muffler did. I think i will upgrade to the apexi n1 universal muffler and get 2.5 inch piping done. So i hope after that it will sound decent.

[windowlicker]

what diameter piping does the 1.8 liter have? just got the car a couple months ago and thinking about getting a different muffler.

[GotToyota]

I NEVER recommend welding a new muffler onto the stock piping, you will NOT see any benefits (other then sound, if you consider that one).

This post has been edited by GotToyota: Aug 24, 2008 - 6:11 PM

[Athorn]

I know you did not recomend it but i told the muffler shop what i wanted and they just welded it on to stock. But i did not get any sound diffrence from stock with the obx. It sounds like a prius lol. But i am thinking about going with this http://cgi.ebay.com/ebaymotors/ws/eBayISAP...rksid=p3907.m29 and get 2.5 inch cpiping from the ccatback..and watch as they do it this time. I think it will be diffrent i have never seen a black muffler and i think it will look pretty cool with my black celi. AND thanks for emailing that guy gotToyota..i did not mean to "shoot" the messanger.

[GotToyota]

You can go with that muffler, but you'll be getting the same results as with the OBX. IMO, it's not worth the extra $150 dollars just for a genuine Apexi. Go back to the exhaust shop, tell them you want to keep the OBX muffler, but just want 2.5" catback piping put on.

-Matt

[windowlicker]

I NEVER recommend welding a new muffler onto the stock piping, you will NOT see any benefits (other then sound, if you consider that one).

i bought the car for $700 and really don't care to spend money on this car. the stock muffler is breaking apart on the inside and has a little rattle to it. since you can get a fart can for like $30 off ebay, i figure what the hell. just wanted to know the stock piping diameter is.

[Athorn]

IS it the larger piping that gives you the sound becase right now mine is silent.

[GotToyota]

IS it the larger piping that gives you the sound becase right now mine is silent.

Yes, the piping is what makes the difference most of the time. Though I know a guy that did the same thing as you and you can actually hear it.

[Akirad1]

who me mine sounds pretty good but i put the silencer back in the droneing sound was gettin on my nerves

[Nyczroflz]

yup... going catless def makes it louder... sometimes i wonder y i do things like that...

[Athorn]

what if i went catless and got a resonater?

[GotToyota]

what if i went catless and got a resonater?

Don't go catless. Get the 2.5" piping, and a resonator. If you go catless, regardless of the resonator, you will have a VERY raspy sound and not pass emissions.

EDIT: Nevermind on the emissions, I see you're from Florida. Oh well, you'll still sound like crap.

This post has been edited by GotToyota: Aug 26, 2008 - 10:26 PM

[Athorn]

What will a respnater do? i dont think it cant be any quiter lol.

[Akirad1]

makes it quiter and its apart of emmisions so they arent legal to have off

[Athorn]

Does it come stock with a resonater?

[Akirad1]

cars yes they do its like the law or something lol

[Athorn]

Well i hope getting the larger piping will make the sound better... idk maybe my muffler is bad.

[Akirad1]

i dunno about that did you ever get the silencer out

[Athorn]

lol yes... after about in hour of pulling/twisting and yanking it came free.

[AnaXyd]

The Megan muffler, is this a noisy muffler? Or a smooth one, which makes nice sound instead of a lot of bad noise?

[Athorn]

So when the cut out the old muffler and piping they also cut out the resonater?

[Akirad1]

no the resonators by the cat i believe its b4 it but i could be wrong my brothers 3kgt had 4 and he cut two off but he lives where emmsions dont matter

[95CelicaST]

Resonators are there to... well exactly what they say - resonate. A resonated system will always sound more smooth and mellow to an identical non-resonated setup. If you're looking for rasp then a non-resonated system is the way to go. I had a non-resonated setup on my wrx and it sounded like a racecar. Swapped out for a resonated setup and it sounds much smoother now.

This post has been edited by 95CelicaST: Aug 27, 2008 - 5:28 PM

[GriffGirl]

IIRC the stock exhaust on an ST is 2.25". If you want to increase that, 2.5" is the best way to go from what I understand.

[95CelicaST]

IIRC the stock exhaust on an ST is 2.25". If you want to increase that, 2.5" is the best way to go from what I understand.

Stock exhaust piping is 1.75". For ST's I would suggest 2.25" upgrade - 2.5" if you're going to end up Forced Induction.

For GT's I would suggest just getting 2.5".


Make sure on any setup you put in at least an 18" resonator.

I've had an SP2 style muffler, N1 style, and EVO2 style, and the best I've had personally, and heard on other Celicas is the EVO2 style muffler. If you want a nice deep tone PLEASE look into an EVO2 style.

Specifically, this is the muffler I had on my Celica - 2.25" piping. Best sound hands down. Clicky





This post has been edited by 95CelicaST: Aug 28, 2008 - 1:04 PM

[GotToyota]

The resonator is separate from the cat, and is somewhere before the muffler. It is NOT needed to pass emissions (I don't even think it affects it, just sound), but you will need a cat to do so.

[Jaws4God]

i can't find what size the stock exhaust is for the 3sgte..

[presure2]

i can't find what size the stock exhaust is for the 3sgte..

its small. IIRC its just under 2.5", and has compression spots where it goes over the crossmember.

a couple of pics of a custom b-pipe i made for dustins swap.

3" mandrel bent stainless, with the super cool exhaust cutout. (remote actuator not pictured)

[GTSOwner]

What's the largest diameter exhaust you can run over the rear axle?

[presure2]

What's the largest diameter exhaust you can run over the rear axle?

i've seen as large as 3" over the axle, but it takes a VERY good fabricator to make it work properly. (im not nearly that good yet....lol)

IMO anything larger than 2.5" shouldnt run over the axle, going that large,(3" or bigger..lol) with the bends it requires, IMO negates the advantages of having the larger pipe.

a couple pics of a downpipe and b-pipe i made for steffs turbo setup this weekend, to mount up to the greddy cat-back she got.(you can see where i added the v-band to the existing pipe laying behind the exhaust in the first pic.)

2.5" stainless mandrel bent, with custom turbo exhaust housing flange by randy (97lestyousay) and some super sweet vibrant v-band clamps. with those vbands, you get perfect alignment of the exhaust because the flanges have a male and female side to align them, and you also do not have to totally take them apart because of the cool snap together v-band that holds them together. ill get a couple pics of one that was left over later.

[97lestyousay]

That pulled up pretty nice, the first pics I saw with the flange sitting on the turbo made the gap
look a little bigger.

[Terracar]

Here is a clear explanation of each a resonator and catalytic converter as well as their function. (courtesy of carexhaust.com)

Catalytic Converter
As already mentioned, the catalytic converter reduces harmful emissions from engine exhaust. It uses a combination of heat and metals that act as catalysts. A catalyst is a metal (or chemical) that causes other chemicals to go through a reaction without being affected itself. The inside of the catalytic converter consists of metals like aluminum oxide, platinum palladium. These metals cause the carbon monoxide and hydrocarbons to react and produce water vapor and carbon dioxide which are much less harmful to the atmosphere.

Resonator
The muffler alone cannot always quiet all of the engine noise. Many car exhaust systems also include a resonator which is like a mini muffler. They are usually straight pipes filled with sound muffling materials. The resonator can be either before of after the muffler in the exhaust system.

-Terracar

[Terracar]

Also wanted to add, man that exhaust work looks very nice..... perhaps you could open an exhaust shop on teh side

-Terracar

[KAOS]

Also wanted to add, man that exhaust work looks very nice..... perhaps you could open an exhaust shop on teh side

-Terracar

I second that!

[GotToyota]

Bump up.

[elastikman]

Maybe next week the defective header i get from ebay, is repair...!

I will put straight exhaust Stainless pipe Size 2" with OBX SP2 - No Cat and no ressonator!
Lets see how this gone end...

[GotToyota]

Maybe next week the defective header i get from ebay, is repair...!

I will put straight exhaust Stainless pipe Size 2" with OBX SP2 - No Cat and no ressonator!
Lets see how this gone end...

It's gonna sound like s**t, sorry to be the bearer of bad news, but no cat and ESPECIALLY no resonator will sound like ****! At least put on 1 resonator, even though I'd put on 2.

-Matt

This post has been edited by GotToyota: Sep 22, 2008 - 9:29 PM

[97celiman]

hey matt what was the name of the exhaust shop that did your supra?

[GotToyota]

hey matt what was the name of the exhaust shop that did your supra?

It's called Big John's Muffler shop. Here is the yellow page info for it:

http://yellowpages.ardmoreite.com/Big+John...59328.home.html

[hurley97]

2.5" stainless mandrel bent, with custom turbo exhaust housing flange by randy (97lestyousay) and some super sweet vibrant v-band clamps. with those vbands, you get perfect alignment of the exhaust because the flanges have a male and female side to align them, and you also do not have to totally take them apart because of the cool snap together v-band that holds them together. ill get a couple pics of one that was left over later.

Hey Manny, put up those pics of the v-band

[elastikman]

Maybe next week the defective header i get from ebay, is repair...!

I will put straight exhaust Stainless pipe Size 2" with OBX SP2 - No Cat and no ressonator!
Lets see how this gone end...

It's gonna sound like s**t, sorry to be the bearer of bad news, but no cat and ESPECIALLY no resonator will sound like ****! At least put on 1 resonator, even though I'd put on 2.

-Matt

No problem... thanks for you advise..
Yeah i like to put some resonator but is a little expensive here in my country.
Whats kind of resonator you advise??

[GotToyota]

Maybe next week the defective header i get from ebay, is repair...!

I will put straight exhaust Stainless pipe Size 2" with OBX SP2 - No Cat and no ressonator!
Lets see how this gone end...

It's gonna sound like s**t, sorry to be the bearer of bad news, but no cat and ESPECIALLY no resonator will sound like ****! At least put on 1 resonator, even though I'd put on 2.

-Matt

No problem... thanks for you advise..
Yeah i like to put some resonator but is a little expensive here in my country.
Whats kind of resonator you advise??

To be honest, I don't know of the types, I just told my local exhaust shop that I wanted a resonator, and they put one on.

-Matt

[Daftboy]

I did all of mine with magnaflow, muffer cat and res.

its 2.5 form the header going into a 2.25 all the way back

This post has been edited by Daftboy: Sep 25, 2008 - 12:53 PM

[GotToyota]

Sounds nice, any pictures?

[Daftboy]

Ummm some where...lol...ill look around for them

This post has been edited by Daftboy: Sep 25, 2008 - 1:34 PM

[presure2]

2.5" stainless mandrel bent, with custom turbo exhaust housing flange by randy (97lestyousay) and some super sweet vibrant v-band clamps. with those vbands, you get perfect alignment of the exhaust because the flanges have a male and female side to align them, and you also do not have to totally take them apart because of the cool snap together v-band that holds them together. ill get a couple pics of one that was left over later.

Hey Manny, put up those pics of the v-band

ahh yea, i almost forgot..lol

here they are.
first the v-band and flanges together:



this 2nd one shows how the clamp part of the setup works. just loosen the lockbolt enough to slip the collar over the T part of the bolt, and the joint is ready to slip apart.



this pic shows the "female" (on the left) and "male" (on the right) sides of the 2 flanges. when you tighten the v-band, you get perfect alignment of the joint with this setup because of the nature if the design. good stuff IMO.



and lastly, the side of the flange that attaches to the pipe.
you can see in this pic how it has a "female" recess, for the 2.5" pipe to fit into a 1/16" or so, which makes for a nice tight fit for welding.



and a repost of the clamps in action on steff's (hurley97) custom downpipe/b-pipe i made here using them.



the PT # shown in the 1st pic is for 2.5" clamps.

[Dr_Tweak]

Did you get a good price on the Vibrant stuff? I carry it if you want to check prices with me sometime.

What's the deal with the two 02 sensors in hurley's downpipe?

-Doc

[Daftboy]

the 7afe has 2 stock O2 sensors

This post has been edited by Daftboy: Sep 26, 2008 - 5:31 PM

[presure2]

Did you get a good price on the Vibrant stuff? I carry it if you want to check prices with me sometime.

What's the deal with the two 02 sensors in hurley's downpipe?

-Doc

she bought everything herself for her setup, im not sure what she paid to be honest...i know a 3"vband like that at the local speed shop is VERY expensive..like close to 80$.

PM me a price on the 3" vibrant vbands, ill be using a few of those in the hopfully near future on my own exhaust!

the 2 sensors are:
1 for the OEM pre cat sensor.
1 wideband / postcat sensor for stock ecu
she also has one farther down the exhaust path, after where the cat would go under the car.
im not sure if its an st, or 96+ thing, its the 1st and only 7afte ive worked on, to be honest...lol

[Dr_Tweak]

Did you get a good price on the Vibrant stuff? I carry it if you want to check prices with me sometime.

What's the deal with the two 02 sensors in hurley's downpipe?

-Doc

she bought everything herself for her setup, im not sure what she paid to be honest...i know a 3"vband like that at the local speed shop is VERY expensive..like close to 80$.

PM me a price on the 3" vibrant vbands, ill be using a few of those in the hopfully near future on my own exhaust!

the 2 sensors are:
1 for the OEM pre cat sensor.
1 wideband / postcat sensor for stock ecu
she also has one farther down the exhaust path, after where the cat would go under the car.
im not sure if its an st, or 96+ thing, its the 1st and only 7afte ive worked on, to be honest...lol

Oh a wideband, that would be it.

Yeah V-bands are VERY expensive. The 3" complete set (clamp and two flanges) are $88.95 each from Vibrant, and they don't discount their stuff very much. I can get them for around $74 and probably work in some free shipping with a good order.

-Doc

This post has been edited by Dr_Tweak: Sep 26, 2008 - 5:57 PM

[mitchy]

my dad said he would make me a sports exhaust for my car (hes made lots for his race bikes and such) so if he can weld all the piping and stuff what parts would I need to buy? i've also heard that I could use 3s-ge headers on my 5S-FE is this correct?

also because my car is a daily driver and I cant really take it off the road does anyone have "plans" or something like that of the exhaust for our cars? if it matters mine is a ST204

This post has been edited by mitchy: Sep 26, 2008 - 6:59 PM

[elastikman]

Maybe next week the defective header i get from ebay, is repair...!

I will put straight exhaust Stainless pipe Size 2" with OBX SP2 - No Cat and no ressonator!
Lets see how this gone end...

DONE!!!!!!!
I pick up the car today from car shop!
The defective ebay header was pain in ass to fix..

Eheheh I recomend Headers and straigth pipe for everyone!!
The car response now is TOP!!

The sound is very loud when you hit the pedal
YEAHH I NEED to PUT ressonator very soon! I almost sure i got the loudest car in all town!!

I will put some video and pictures very soon!!

This post has been edited by elastikman: Sep 26, 2008 - 7:16 PM

[Dr_Tweak]

my dad said he would make me a sports exhaust for my car (hes made lots for his race bikes and such) so if he can weld all the piping and stuff what parts would I need to buy? i've also heard that I could use 3s-ge headers on my 5S-FE is this correct?

also because my car is a daily driver and I cant really take it off the road does anyone have "plans" or something like that of the exhaust for our cars? if it matters mine is a ST204

You would just need the piping, flanges, hangers, resonator (if used), muffler (if used), and cat (if used). And a flexpipe.

-Doc

[presure2]

Did you get a good price on the Vibrant stuff? I carry it if you want to check prices with me sometime.

What's the deal with the two 02 sensors in hurley's downpipe?

-Doc

she bought everything herself for her setup, im not sure what she paid to be honest...i know a 3"vband like that at the local speed shop is VERY expensive..like close to 80$.

PM me a price on the 3" vibrant vbands, ill be using a few of those in the hopfully near future on my own exhaust!

the 2 sensors are:
1 for the OEM pre cat sensor.
1 wideband / postcat sensor for stock ecu
she also has one farther down the exhaust path, after where the cat would go under the car.
im not sure if its an st, or 96+ thing, its the 1st and only 7afte ive worked on, to be honest...lol

Oh a wideband, that would be it.

Yeah V-bands are VERY expensive. The 3" complete set (clamp and two flanges) are $88.95 each from Vibrant, and they don't discount their stuff very much. I can get them for around $74 and probably work in some free shipping with a good order.

-Doc

yea, the vbands definetly are cost prohibitive for most of the guys, but i really like them, and if you can afford them are the way to go IMO.
thats a good price for them, ill shoot ya a PM when the time comes that i need them.

[elastikman]

Here is, like promise!

4-2-1 Header with DEI wrap.





OBX SP2







i will put soon some videos...

[njccmd2002]

now that we are talking about exhaust. can somebody teach me the parts of the celi.

now, i know the first part is the catalizer that goes into the downpipe that connects to the flex pipe, but i see my car has like another cat and a tube before the muffler? what are those.

[presure2]

the smaller one is the cat, the bigger muffler looking one is the resonator.

[njccmd2002]

ok so it flows like this.


header -> Cat-> downpipe----> flexpipe---------> 2nd cat------------Resonator----------->muffler!!!

thanks. too complicated!!!

[hurley97]

Did you get a good price on the Vibrant stuff? I carry it if you want to check prices with me sometime.

What's the deal with the two 02 sensors in hurley's downpipe?

-Doc

she bought everything herself for her setup, im not sure what she paid to be honest...i know a 3"vband like that at the local speed shop is VERY expensive..like close to 80$.

PM me a price on the 3" vibrant vbands, ill be using a few of those in the hopfully near future on my own exhaust!

the 2 sensors are:
1 for the OEM pre cat sensor.
1 wideband / postcat sensor for stock ecu
she also has one farther down the exhaust path, after where the cat would go under the car.
im not sure if its an st, or 96+ thing, its the 1st and only 7afte ive worked on, to be honest...lol

Oh a wideband, that would be it.

Yeah V-bands are VERY expensive. The 3" complete set (clamp and two flanges) are $88.95 each from Vibrant, and they don't discount their stuff very much. I can get them for around $74 and probably work in some free shipping with a good order.

-Doc

I got mine from Verocious Motosports for $72.93/ea plus shipping, I paid about $220 on three flanges, of which we only used two.

Anyone want to buy a 2.5" V-Band clamp and flanges for $75 shipped?

the 96+ 7A has no cat in the manifold, just the small one underneath. So the first O2 sensor is in the downpipe and the second is after the cat which is under the car.
the second sensor in my downpipe is just a wideband, as Manny said.

This post has been edited by hurley97: Sep 28, 2008 - 6:07 PM

[elastikman]

ok so it flows like this.


header -> Cat-> downpipe----> flexpipe---------> 2nd cat------------Resonator----------->muffler!!!

thanks. too complicated!!!

I think is more like
header -> downpipe----> flexpipe--------->Cat------------Resonator--------->muffler!!!



Like promise here is the video:

@Headers 4-2-1
@Straight exhaust 2" No-Cat, No-Resonator.
On CELICA 1.8 ST 7AFE

VIDEO: http://www.youtube.com/watch?v=3QfxprvM548

This post has been edited by elastikman: Sep 30, 2008 - 4:35 PM

[97celiman]

i dunno i have 2 cats...maybe its a obd thing??? i dunno just guessing...maybe dr tweak could straighten us out

[njccmd2002]

i tought 97 gt have a cat in the header, thus 2

[delusionz]

I beg to differ on a number of points, but what I have to say doesn't apply to the US folks as they don't have 3s-ge motors and legally require catalytic converters....

But assuming you have a 3S-GE motor as I do, Which comes with decent 4-2-1 headers and a 2.5" system as standard and you live in a country with no emissions laws as I do....

1. The point made about a cannon muffler on a stock system will do nothing at all except sound louder...

-- the standard 2.5" is already big enough for a 2 litre NA motor, still need to upgrade pipe?
-- the cannon muffler flows straight, it doesn't zig-zag from 1 side to the other in an oval
-- the stainless steel cannon muffler has got to weigh less than the large cast iron oem muffler right?

2. the point made about not decatting...

-- the uk 3s-ge guys say their midrange acceleration is freed up
-- a straight pipe weighs 15kgs less than the catalytic converter

[GriffGirl]

For those of us for whom a cat is required, there's always the option of investing in a good quality high-flow cat if you really want to free up that airflow. I think ceramic cats are supposed to be the best, but they don't come cheap.

[DEATH]

A $100 magnaflow hiflow does the trick for almost nothing and very little restriction - IMO the way to go.

[hurley97]

I've been driving my car with a straight exhaust, no cat, for about a month now and the P0420 Cat Below Efficiency code only came on once about two or three weeks into it. I thought it would realize there was no cat much much sooner and more often. I'm waiting for it to come on again to determine the approximate time frame and driving habits that cause it to throw the code.

My backup plan if it threw the code too much was to use some spark plug non-foulers from Autozone and do what some Subaru guys do to pull the O2 sensor out of the direct stream of the exhaust gas which causes it to read leaner than the primary O2 and tricking the computer into thinking everything is fine:

[DEATH]

Oh that is an awesome idea. Will defintely help the OBD2 guys when they install a header.

[delusionz]

Out of curiosity why would you want the o2 sensor reading leaner than it is? When the ECU reports cat below efficiency how does this impact the performance and driveability of the car?
For this trick to work would you not need a separate AFR management system with a separate wideband o2 sensor?

[hurley97]

The second o2 sensor after the cat does nothing but tell the computer that the cat is working. The converter is supposed to filter out the exhaust gas, so a leaner reading means less fuel in the mixture with means the exhaust gas is being filtered well enough. The second o2 sensor does not affect how the car runs.

[95CelicaST]

What I did on my WRX (and I know this has no practical use in the Celica world unless turbo) but I had a small curved pipe welded into my downpipe for the o2 sensor. This way it sits out of the stream, but still reads normally. Let me try and dig up a picture.



This post has been edited by 95CelicaST: Oct 1, 2008 - 8:32 AM

[elastikman]

Hey!
Whats best option ?
1x 18" resonator
or
2x 10" resonator ?
or
other configuration ??

[hockeyplyr24]

hey everyone

figured i'd show ya my muffler. i have a custom catback..but had to get a new muffler welded on and it actually just got done about an hour ago. This time i went with the OBX B10 that they were talking about in the beginning of this thread. I definitely like it, its pretty big, and made it A LOT quieter than my other muffler. heres a couple quick pics. sry if the quality isnt that great its from my iphone







lemme know what you think about it

[elastikman]

Thats a BIG muth*f**er muffler!!! ehehe

[GotToyota]

Nice work, but I personally don't like how many people have their mufflers pointing down, like you do. I prefer the look my Supra had, which was actually tilted up and angled out.

Basically it's this:


Compared to this:


You decide which one looks better.

-Matt

This post has been edited by GotToyota: Oct 3, 2008 - 6:07 PM

[hockeyplyr24]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

[GotToyota]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

I understand and I agree that it still looks good. What size is your piping? How do you like the muffler? It's one I always recommend.

-Matt

[hockeyplyr24]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

I understand and I agree that it still looks good. What size is your piping? How do you like the muffler? It's one I always recommend.

-Matt

piping is only 2 1/4...

i def. like the exhaust so far tho..even tho it is big i kinda like it lol after seeing it on ur supra i wanted to eventually get one like it and here i am haha

[GotToyota]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

I understand and I agree that it still looks good. What size is your piping? How do you like the muffler? It's one I always recommend.

-Matt

piping is only 2 1/4...

i def. like the exhaust so far tho..even tho it is big i kinda like it lol after seeing it on ur supra i wanted to eventually get one like it and here i am haha

Cool cool. Do you have a video camera so you can get a sound clip for us? And do you have a cat, resonator, none of the above? Tell us more about the piping setup.

This post has been edited by GotToyota: Oct 4, 2008 - 12:58 AM

[hockeyplyr24]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

I understand and I agree that it still looks good. What size is your piping? How do you like the muffler? It's one I always recommend.

-Matt

piping is only 2 1/4...

i def. like the exhaust so far tho..even tho it is big i kinda like it lol after seeing it on ur supra i wanted to eventually get one like it and here i am haha

Cool cool. Do you have a video camera so you can get a sound clip for us? And do you have a cat, resonator, none of the above? Tell us more about the piping setup.

nah i dont have a camera out at school with me. It does have a cat but no resonater, thats basically about it, if i ever get a chance i'll get a video tho

[GotToyota]

Sounds nice. If you stumble around a video camera take a vid for us!

-Matt

[parriehunter]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

I understand and I agree that it still looks good. What size is your piping? How do you like the muffler? It's one I always recommend.

-Matt

piping is only 2 1/4...

i def. like the exhaust so far tho..even tho it is big i kinda like it lol after seeing it on ur supra i wanted to eventually get one like it and here i am haha

Yea i like the look of it, how loud do you reckon it is compared to stock?

[hockeyplyr24]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

I understand and I agree that it still looks good. What size is your piping? How do you like the muffler? It's one I always recommend.

-Matt

piping is only 2 1/4...

i def. like the exhaust so far tho..even tho it is big i kinda like it lol after seeing it on ur supra i wanted to eventually get one like it and here i am haha

Yea i like the look of it, how loud do you reckon it is compared to stock?

well my car hasnt had stock exhaust in probably about 5 years lol..but i dont remember it ever being loud..this is definitely a lot louder than stock, i'd have to get a vid to show its too hard to explain with just words lol

[mneal2_92788]

mine is just the stock exhaust with no muffler. cut off at the rear axel. sounds good too.

[AnaXyd]

Whats the standard piping of the 7AFE engine? I am planning to buy the Megan Racing N1 muffler, but need to make sure it fits. Is 4" outlet overkill?

[GotToyota]

I believe the smallest they have is 2.5" inlet (the muffler). You will need to go to an exhaust shop to have them make a piping adapter, since I imagine the stock piping size is 2" or smaller.

This post has been edited by GotToyota: Oct 5, 2008 - 3:16 PM

[parriehunter]

yeah i wanted it to have more of an upward tilt..but the guy couldnt mess w/the piping w/o charging me..it doesnt look horrible tho..i can deal w/it..plus they are both diff cars and have diff looks..if my piping were any lower it would scrape all the time..my muffler already scrapes


and yeah..its freakin gigantic..didnt think it'd be that big lol

I understand and I agree that it still looks good. What size is your piping? How do you like the muffler? It's one I always recommend.

-Matt

piping is only 2 1/4...

i def. like the exhaust so far tho..even tho it is big i kinda like it lol after seeing it on ur supra i wanted to eventually get one like it and here i am haha

Yea i like the look of it, how loud do you reckon it is compared to stock?

well my car hasnt had stock exhaust in probably about 5 years lol..but i dont remember it ever being loud..this is definitely a lot louder than stock, i'd have to get a vid to show its too hard to explain with just words lol

Awesome. Yea i guess it is hard to explain with words. anyone got a vid of there stock 5s or 3s? Get some before and afters.

[mitchy]

does anyone know what difference to the sound of a stock exhaust and muffler these three mufflers would make?

OBX EVO : http://cgi.ebay.com/ebaymotors/ws/eBayISAP...hlink:middle:us

OBX Apexi WS: http://cgi.ebay.com/ebaymotors/OBX-Apex-i-...sspagenameZWDVW

OBX SP: http://cgi.ebay.com/ebaymotors/ws/eBayISAP...em=350106496286

or this : http://cgi.ebay.com/ebaymotors/ws/eBayISAP...em=360090419964

would these sort of sound like a cannon/fart can/canister? I kind of like that sound but like the look of these better. or if these would sound like it actually goes fast that would be cool. which one would be the best? although i am looking at the OBX coz they are cheaper haha

This post has been edited by mitchy: Oct 7, 2008 - 3:39 AM

[95CelicaST]

EVO. I know how it sounds, and it is good.

[GotToyota]

I personally like the OBX WS. I didn't know they made those, it looks nice. I'd rather get that then a canister.

This post has been edited by GotToyota: Oct 7, 2008 - 6:07 PM

[mitchy]

can you describe the sound they make? i kinda want it to sound like a fast race car or deeper. If you saw the dual exhaust set up video in the for sale section wud any of these make it sound close to that? but i like all 3 of these :S

PS i know my car will only be stock but i want it to sound cool

This post has been edited by mitchy: Oct 8, 2008 - 4:07 PM

[Random_Stranger]

Got my exhaust off ebay for $30 shipped. Tried it out after hearing a nice one on youtube. I must say, it sounds great the way it is, without the silencer. I get a lil pop when I switch gears after 1st and 2nd, but I kinda like that. Reminds me of rally cars. Anyways, I went with 2.5" piping and didn't feel any HP difference....... Until the inside blackened out and the burnt smell that was coming out of the exhaust left. Now I feel a difference. I know nothing of HP differences, but if I had to say, this feels like I gained around 10HP from it. But the car does get up a lot faster. I know my baby to the point where I can tell if pressure in my tires is lost from how she handles and accelerates. So yes, there was a HP difference. I wanted to get an HKS, but I will wait until after the swap in late 2009/early 2010, where I will go with either 3" or 3.5" piping.

This post has been edited by Random_Stranger: Oct 8, 2008 - 1:49 AM

[GotToyota]

can you describe the sound they make? i kinda want it to sound like a fast race car or deeper. If you saw the dual exhaust set up video in the for sale section wud any of these make it sound close to that? but i like all 3 of these :S

PS i know my car will only be stock but i want it to sound cool

I like the mufflers in that style because they tend to offer a much deeper exhaust tone due to their internal baffling.

[Blk94St]

I just got my new JDM 7afe today, put in monday ! Oil pan cracked, slung a rod in the original (152,000) I have had the car since late august. Early sept. clutch had went out. Had stock clutch, and the man who i bought it froms wife had been driving it. She hit a parked car... WTF?!? Fender is got a small dent in it. Anyways to the point, I go to the local Pull A Part, i just go and look around often and scope for cars i'd like to buy and have a nice lil project this summer. While walking around with a friend i found a Honda Crx, ( Had Civic cut out in the hood LMAO). The car looked like crap. Anyways, while laughing at this, i glanced down and saw a Dynomax exhaust on it. Looked it up its a muffler Dynomax and Bosal got together on. Sounds really good. Wasnt too hard to find it on youtube. I'm going to go 2.25 piping, and delete the cat.

My question is
What would i do with the O2 sensors?

BTW ... 1994 St 5 speed.

My friend also had a 1994 St Auto, he cut his cat and resonator off. SOUNDED LIKE ****. His muffler was pretty cheap, and sounded crappy. He put his resonator back on, didn't sound THAT bad, still sounded like a ricer b/c of that muffler.
Yes yes, In mississippi Not having a Cat is illegal, BUT people here really don't care as long as your not doing a drive-by.


My two cents.
I agree with the anything above 2.5 pipe on a N/A, anything bigger, sound like a ricer who's about to blow the engine. I also know in most southern states a resonator isn't required, running pipe no bigger than 2.5 with factory resonator to a decent muffler to me and many others not so raspy. The resonator muffles the sound, but not all of the sound. It helps the sound volume and the sound quality. To each their own, but different people think different systems sound like complete ****. I have a friend who has a magnaflow cat, older Greddy muffler 2.25 pipe, it sounds like crap, but so does a straight pipe with no cat or res. to a muffler, its way loud. If people can hear you over a mile away in a city than yes, its way to loud.

[Akirad1]

st id say 2.25 or 2.5, and just got to your local shop and have them weld a new bung in a location similar to then og one. so it doesnt mess with the sensors positioning and stuff like that since it all programed for the way it is so it may mess with it if you move it to far from the original position. but i may be wrong

[Blk94St]

is this the obx you were talking about?

I want a deep sound, not something high pitched and rattles.