1967 side exhaust

[Rex T.]

I have a friend who has a 67 coupe with a 327-350 engine, same as mine, but the difference is in the side exhaust. His has the original 2 inch exh manifolds and mine have been replaced with 2.5 inch manifolds. Both have original GM side exh mufflers (mine are a little newer). The two cars sound quite different and his seems to have a little more power than mine (4.11 rear in his vs 3.70 in mine). Would you expect the 2 inch vs 2.5 inch to make that much difference in sound and performance?
Thanks,
Rex

[Wayne K.]

Re: 1967 side exhaust

Rex,

I don't know if the 2 1/2 inch manifolds would make a difference in sound but I do know the 4:11 gears would make a performance difference everything else being the same.

Wayne