The 68 exhaust manifold outlet is larger than the 67 on back.
You might want to use a 68 headpipe to take advantage of the larger manifold.
I believe there is a 1/4" difference in diameter of the manifold outlet & the 68 headpipe.
I would take advantage of the extra pipe diameter of the 68. Bill
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.