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      01-20-2013, 03:53 PM   #49
Drives: m3
Join Date: Oct 2012
Location: CA

Posts: 220
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Not being an exhaust engineer, I have to think the importance of placement both relative to the headers and to each other would drastically effect the performance of an H pipe and X pipe both used alone but even more so in conjunction with each other.

I mean used too close together could produce a equalization of pressure at a point where the x pipe is relying on higher pressure on one side to scavenge or somethiing (just example with no real merit but just illustrate point)
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