Correct Exhaust size

[Bob R.]

Does anyone know the correct exhaust diameter for a 67 327 350hp.
2" or 2 1/2" ?. Also any suggestions as to the best source for a welded system with correct NCRS specs?

Thanks, Bob

[Bill I.]

Re: Correct Exhaust size

Bob, it's 2". Bill

[R N.]

Re: Correct Exhaust size

It's 2" at the exhaust manifold and then the exhaust pipe expands to 2-1/2" all the way back. Exhaust tips I believe are 2" coming out the muffler. The forward exhaust pipe expand approx. 6" or so from the bottom of the exhaust manifolds.

Both Gardner and Corvette Central have nice systems for your car. Look at Gardners website and you can see good photos of the sytem.

[Joe L.]

Re: Correct Exhaust size

Bob, it's 2". Bill

Bill and Bob-----


The exhaust MANIFOLD OUTLET size for all 1967 small blocks was 2". However, the exhaust pipe diameter was 2-1/2" for all except 300 hp with Powerglide.

[Bob R.]

Re: Correct Exhaust size

Thanks to everyone, I have ordered a system from Zip.
Thanks again,
Bob