Re: X or H pipe?
Depending on your engine and cam it will make a difference. LS motor Sounds better with an X pipe. ....SBC motor H pipe. I installed an H. Didn't care for the motor boat sound at idle. Not sue if it was the mild cam or what, but I took it off, back to true duals.
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1970 C10 Short Stepper with 71/72 front clip.
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