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-   -   Diameter of Exhaust? (http://www.njfboa.org/forums/showthread.php?t=34785)

SupermanX24 06-05-2008 06:13 PM

Diameter of Exhaust?
 
What's the diameter of the over the axle pipe on a stock LT1 car? I just might do a custom job myself.

Featherburner 06-05-2008 06:59 PM

I think it's 2.75"

JL8Jeff 06-05-2008 10:16 PM

Factory pipe is 2-3/4 and most aftermarket cat-back are 3".

SupermanX24 06-18-2008 06:44 PM

2 1/2. I took the muffler off and measured. Thanks anyway guys

Tru2Chevy 06-18-2008 09:06 PM

Wow....you sure that's a factory pipe? I always heard and saw that all 4th gen v8 cars had a 2.75" factory pipe.

- Justin

SupermanX24 06-19-2008 06:25 AM

pretty sure, the entire exhaust looks stock. I got the muffler off and measured the pipe and sure enough, 2 1/2

NJ Torque 06-19-2008 11:21 AM

Your car single or dual cats, Pat?

SupermanX24 06-19-2008 04:22 PM

single

JL8Jeff 06-20-2008 08:34 PM

The tailpipe outlets are 2-1/2 but the inlet should be 2-3/4 or 3". It actually necks down at the y-pipe connection too.


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