Hi!
Can you please advise whats the best Perimeter size for the catback for a celica 1.8 7afe.?

The car have STAGE 1 @mod only.

What the best option size you think is the best ?

Thank you a lot

I'd say 2.25". Why? You don't have to worry about too much backpressure with an N/A (which some people say you can't have too much), and two, you will still have a noticeable gain in low as well as top end.

-Matt

2.25 or smaller. 2 inch is more than enough for a stock 7afe. 2.25 is getting a little large, and anything bigger is too much and will degrade performance. too large a pipe without the flow to fill it degrades the scavenging effect of your exhaust system, literally causing the gasses to back up in the pipe as they cool and slow down at lower engine speeds. in extreme cases this can cause a noticeable lack of low rpm power and even hesitation.

And is good option to add RESSONATOR ??

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Oh yeah, I forgot to mention the resonator. PLEASE add one, you'll be glad you did.

Hey!!

The local shop guy tell me that is good option to go with the 50mm size this is about:
50 millimeters = 1.96850394 inch

But deep felling tells me to go with the 55mm size is about:
55 millimeters = 2.16535433 inch

lol

European and US size is a little bit diferent...

what do best option do you think ?
Go for the local shop guy or go with my thought ?

Thanks a lot

You will be fine as long as you aren't getting a three inch or anything. To be honest, almost any size will technically work.

My rule is stay with 2.5" or below if your car is N/A.

had my 94 celi 7a for 2 weeks. had a 99 mustang. had a wreck. love the 6 gens and 7 gens. but my car is stock and want an exhaust. what size would i need inlet and outlet? and wat else would i need? any places you know where i can get any? i was readin and saw what size but i cant find one. im 17 and cant really spend over about a 100 but thats just on the muffler. everything i find is 3 inch or bigger.

HELP??

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are people stupid or just illiterate these days?

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