6G Celicas Forums

any idea how much louder and what effect it'd have on the sound?

well the set up i had when i got my headers installed was i took out the old cat and went straight pipe. And lemme tell you, sounded like crap. Then put magnaflow high flow cat and sounded nice. Now its still a little raspy but only in 1st and 2nd gear after 4k. So once i get magnaflow resonator (or if its even called a resonator from what another member said) it will be a perfect set up i think.

I called muffler shop and they told me to choose between a 18 inch or a 14 inch resonator. is there a 12" magnaflow resonator??

but wow man those magnaflow cats work wonders and I'm going to get one in the future

sure is a 12 inch. I ordered it from ace's the same guy who put flowmasters on my old mustang but see I'm going same pipe route as factory and i.ll have stock header magnaflow resonator and muffler.

it maw have been 14 if maw have just gotten confused

if you have stock headers, leave the post cat on (the one under the car) and it should sound good

the cat by the bottom of the header or the second one and where should the magnaflow resonator be mounted at

Since i live in CA, emission laws are very strice over here obviously cause population of CA is so big.

The pre cat (other wise known as the cat converter that is inside of your stock headers) and then theres the post cat (the one that sits under your car.

When i installed ebay headers i obviously took out stock headers, which then in turn took out the main cat converter. (so next time i go to do smog i wont pass).

Your doing a cat back exhaust system, so that means you can either take out the post cat (one under your car, which i advise not to take out, but ask exhuast shop to see what their opinion is.)

The resonator goes right before your dynomax muffler.


get some pics of your car on your profile!!

This post has been edited by BonzaiCelica: Mar 5, 2009 - 11:06 PM

thanks man oh how close to the muffler? and I just got another camera ha no idea where my other one went. I ask how close because if I don't like the muffler I'm gettin an obx

oh if the pre cat is connected to the header how difficult is it to remove

and if I get a magnaflow cat? could ya give me a run of what I need? and for right now would I run 2.25 pipe from header to post cat

I'm not too sure you'd want to remove the "pre-cat", with all the work that would be involved manufacturing some new pipes and installing, it might be cheaper to get the ebay headers. The easiest thing would be to run the cat back (which is from the "post" cat and back). Its simple, run 2.25-2.5 pipes (mandrel bent pref), from your post cat (which you can either replace with an OEM, Aftermarket, or High Flow...or just remove, that would depend on your emission regs from your state), to your resonator (again, can replace) then to your muffler.
The main reason why I recommend you dont mess with the pre cat is if you do decide to remove it, and take it to a shop, they may not help you out as your tampering with emissions stuff. But if you know someone who can do it and your dead set on doing it, go for it.

just use the edit button if you want to add to your comment, i guess ur not supposed to post up on the same topic two times in a day.

alright sounds good. i have to get a vid of my set up on this. I'll record the exhaust sound with the camera pointing at my exhaust, and then a drive by from 1st through 3rd. except 3rd tops out at 85mph (speed limit on freeway is 65mph and i wont be filming on the freeway). So some of the members that are in charge of closing posts and warn people of misusing the forums, will tell me that we dont want to advertise any sorta racing. so i'll get permission to see if doing a drive by until the end of 3rd gear is ok.

This post has been edited by BonzaiCelica: Mar 7, 2009 - 9:59 PM

thanks. i.ll run from the post back for now. I despise exhaust that's way too loud and raspy and I don't want mine like that. i.ll put a clip of it up when it's done

I finally got my exhaust on. got pictures before and after and a video i.ll post up later. have stock header pre cat post cat magnaflow 12 inch resonator to dynomax muffler not that love though but it does have a deep tone. would a high flow cat fix this? it gets raspy around 4800 rpm's but that's find I don't usually ldu it get that high


^^^^ Scratch that here are pictures












This post has been edited by Blk94St: Mar 12, 2009 - 4:21 PM

Well its been a long time coming but I'm finally getting my exhaust clip up here hopefully it does my exhaust justice, I've only been able to hear it on my camera ha ha

Custom 2.5" exhaust, header back, 2 AR25 AeroTurbine Resonators, and a Borla XR1 Muffler

Do i need a resonator with the Megan Racing N1 muffler?

And, is it a good muffler?

Resonators are on your own discression. From what I've heard that is a good muffler, don't know from experience. I wasn't running any resonators and after a few months i couldn't take it any longer, I now have 2. And it's still pretty loud, definitely no rasp anymore tho. You might run into rasp without a resonator.

and what are your plans for your exhaust?? full exhaust? what size?

This post has been edited by bseaman_5: Mar 13, 2009 - 1:34 PM

I am planning just to change my stock muffler with a new muffler which makes a bit more tasty sound. I have no plans to do a full cat back yet, so my plan is to try a muffler before I am doing more changes. I have a stock ST, so I think the size of the exhaust pipes is around 1,75"?

my personal opinion man get the muddle and save with two acts and that factory denser it won't be that loud I got my piping done for 60 even and got the muffler for like 12 bucks at pull a part. and 31 bucks for the resonator

In my opinion don't bother getting a different muffler if you aren't going to do the exhaust... I got my exhaust done for 110 full header back exhaust. I later bought the resonators so in the long run it cost quite a bit but it can be very affordable if you shop around.. The muffler you will get will more than likely have an inlet larger than 1.75" so you will have to get someone to weld it on anyway.. I would suggest going w a 2.25" or 2.5" exhaust and get it over with... Just my opinion...

ilike header back 2.5, no cat ,one maybe two res.,to the muffler and it should sound good