Is a 2.5in exhaust too small for FI?
Honda-Tech Member
Joined: May 2002
Posts: 1,216
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From: FL, USA
Re: Is a 2.5in exhaust too small for FI? (mantic6t9)
That would depend on your setup and performance goals..Need more info for a better answer..Just in general, no 2.5 is not too small. Some people run FI on stock exhaust.
Junior Member
Joined: Aug 2001
Posts: 554
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From: NoVA, USA
Re: Is a 2.5in exhaust too small for FI? (4 Stroke)
The way I see it is, If people are going to run twenty-some lbs of boost at the track and run a 3" downpipe, no cat, and a 3" exhaust. Then running 8-9 lbs on the street with a 2.5" downpipe, 2.5" cat and 2.5" exhaust is fine. I think the reason most people tell you to get a 3" is because it will give you slightly better spool up and HP but if you don't plan on boosting real high, I personally feel that you don't need it. Plus it's loud.
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