6G Celicas Forums

I'm about to buy this or this header to add a little more noise and a little more punch with a good look under the hood.

Will these be a direct bolt on? Will both the o2 sensors hook up or does my Celica 7afe only had 1 o2 sensor?

Thanks!

This post has been edited by onnaj: Dec 11, 2012 - 12:18 PM

it will bolt to the head, but the downpipe will need modification.

http://www.6gc.net/howto/install_7afe_header

I'm pretty sure the tuning pros headers are from ebay. I have those exact headers on my car . There actually pretty ****ty . The material is crap . I have to rethread a couple of bolt holes on the header itself because the engine rattled it around so much it stripped the thread lol. If you still choose 40 doller headers from eBay , you will need to use half of your stock down pipe, and the half of the down pipe that came w the headers ( the part w the co2 sensor. Or else the pro tuning headers down pipe won't work . I'd go legit now that I've gone the other rout haha

How many gains do you guys think i might expect from different headers in combination with an open air intake? I don't want to change the rest of the exhaust btw.
I prefer a 4-2-1 design because i don't want to loose too much in the low's and mid's.

not much gain. maybe a few hp's. Youll notice the sound more than the power

is 10-15 hp achievable with the headers and the open air intake do you think?

Maybe if you did a header, full exhaust, and air intake you might gain 10 hp. That's being optimistic I'd think. Only way to know for sure is to dyno before and after.

The sad reality is that there is really no gains from any of these mods on a 5s. 5-10hp is the error margin that happens between runs anyway and can't really be measured as a gain.

It's a 7afe so it wouldn't even be 5hp sadly

Moral of the story, should've had a V8. This is why I'm not bothering with the exhaust on my car. Might do a muffler, but that's it.

Does it change when i say i always fill her up with 95 octane?

nope.

When I had my 7A, I felt a difference with the ebay manifold but I also had a modified air intake and advanced ignition timing.

How did you advance ignition timing?

It changes your bank account, but that's about it. Octane does not equal power.

Well, if it was designed to run on higher octane fuels it does.

I'm going to tell you from experience, when I put on my eBay tuning pros headers, it was loud as ****! As the stock headers have a cat built in. The tuning pros is just straight pipe. I also only have one cat after changing my headers and my exhaust piping from 2.0 to 3.0. The piping gives a real deep throaty sound. Real nice. As for gain, I had my cat back exhaust on before I installed the headers . I felt a lil bit torque loss. But in the higher gears it was def better. Maybe 10 hp

In Holland we don't have less the 95 octane. We also have 98 octane and when i go to German i can buy Shell Vpower 100 with octane 100.

Does someone has a picture of the original header and downpipe?

This post has been edited by onnaj: Dec 12, 2012 - 1:02 PM

You don't have the same Octane scale we do.

http://en.wikipedia.org/wiki/Octane_rating