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I have headers to sidepipes on my '66BB, and I noticed a slight popping(motorboat) noise in the exhaust note. I researched it in previous posts and found others have experienced the same type noise. Several photos were shown of crossover pipes and reports were that it gave a deeper, more mellow exhaust note and eliminated the "motorboat" sound. Have not installed one on my car but I intend to. Looks like an easy install for a muffler shop.
Last edited by hundriver; Sep 3, 2021 at 10:09 AM.
Obviously the X pipe provides a slight increase in power or NASCAR wouldn't be using them. With sidepipes it's next to impossible to design an X pipe, I'm going with a crossover pipe(H pipe sort of) on my BB with headers to smooth out my exhaust note.