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
Thanks,
Rex
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