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      04-07-2012, 02:44 PM   #9
m3an
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Drives: M3
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there's some good articles to be found if your search re: h-pipes vs. x-pipes on v8 engines. Basically the idea behind both is to equalize the constantly changing pressure/velocity in each bank. The x-pipe design forces the cross-over whereas the h-pipe using the exhaust own scavenging to pull exhaust from one pipe to the other to equalize pressure.