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proper exhaust size for STS autocross car

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Old 08-22-2002 | 10:37 AM
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AwwsChwA's Avatar
AwwsChwA
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From: San Diego, CA
Default proper exhaust size for STS autocross car

Ok, I'm tryin to figure out how much bigger, if at all, an exhaust I should go with to set my 91 CRX Si up for STS autocross racing...

STS allows just boltons. Intake, headers, exhaust. Emission controls have to remain, but they do allow a programmable ECU. So, keeping those in mind, should I go with...

a 2.00 inch exhaust from the catylitic converter back?

a 2.25 inch exhaust from the cat back?

a 2.5 inch exhaust from the cat back?

or...should I go with some custom size like a 2.1 inch?

thanks guys
Old 08-22-2002 | 10:51 AM
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I'd say 2.25"....2.5" is a little extreme on a single cam.
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