Video: Comparing H-Pipe vs. X-Pipe Exhaust Systems and
https://www.onallcylinders.com/2017/06/15/video-comparing-h-pipe-vs-x-pipe-exhaust-systems-and-which-to-choose/
WEBJun 15, 2017 · Strictly from a horsepower standpoint, X-pipes tend to make more power than H-pipes, as exhaust scavenging performance tends to be better in an X-pipe crossover design. (NOTE: This is ONLY true when your X-pipe dimensions are properly matched to the exhaust gases produced by your engine.)
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