Re: H Pipe or X Pipe?
X pipe will make it quieter and you'll gain a few hp up top.
I have 3" one chamber race mufflers on my 67 Camaro and they aren't as loud as the 3" super 40s I have on my 74 'Cuda, but the camaro has an x-pipe where the cuda doesn't have any balance pipe.
1967 Camaro SS: 406 sbc, 522hp/514 ft lbs, Doug's 1 3/4" headers, M20, posi, 3.73's, vintage air gen IV, IROC steering box, Comp Eng. weld-in sfc's & traction bars, chrome US Mags
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