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73-87 Chevy _ GMC Trucks => Performance => Exhaust => Topic started by: Stewart G Griffin on December 25, 2014, 09:08:39 am

Title: Stock exhaust size?
Post by: Stewart G Griffin on December 25, 2014, 09:08:39 am

Does anyone know what the stock exhaust pipe size is for a small block equipped truck?  Both O.D. and I.D?

i'm specifically interested in the downpipes from exhaust manifolds to the y-point/cat converter, but if you could tell me the size for the whole exhaust system that would be super helpful.

Title: Re: Stock exhaust size?
Post by: Captkaos on December 25, 2014, 09:51:22 am

2" or 2.25"

Title: Re: Stock exhaust size?
Post by: jg1977c20 on January 18, 2015, 04:09:14 pm

2.5" single exhaust to 2.5"in muffler with a 2.25 " tail works nice on a stock 350

if going dual 2.25" is biggest you want to go - both these set ups are good to 300 hp