Stock exhaust size

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Oct 9, 2017 | 01:12 PM

Johny2234

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Joined: Oct 2015

Posts: 128

Likes: 3

From: U.S.A.

Car: 1990 Trans Am

Engine: 383 stroker

Transmission: 700r4

Stock exhaust size

My exhaust has a hole in it near the rear axle and I was wondering what diameter the stock exhaust is. It's a 1990 trans am originally with a 305 tpi but was changed to a 350 tpi by gm goodwrench in 1995. Thanks.

Oct 11, 2017 | 05:59 AM

turd_gen

Member

Joined: Feb 2016

Posts: 174

Likes: 0

From: Kingston, ON

Car: 1985 Trans Am

Engine: 350

Transmission: T5

Re: Stock exhaust size

As far as I know, it could be 2-1/4" or 2-1/2", but the only way to know for sure is to go out and measure it yourself.

Oct 11, 2017 | 06:13 AM

Saxondale

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Joined: Oct 2014

Posts: 750

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Car: 84 Z

Re: Stock exhaust size

I've heard 2 3/4 inch diameter from factory. Not confirmed.

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