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Old 04-26-2009, 05:39 PM
brian400ex brian400ex is offline
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sonic booms from sbc 350?

I have a 1966 impala with a mildly built 355. duel 3" exhaust with "X" pipe and 40 series flow masters that end right before the rearend. car runs great but i get these sonic boom sounds when cruising at about 3,000 rpms. tack does not jump. is this normal with my exhaust?

Last edited by brian400ex; 04-26-2009 at 06:24 PM. Reason: wrond description of exhaust
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