Thread: H-Fit type M
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Old 06-27-2009, 11:31 AM
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polaski polaski is offline
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Wow that does look clean. I just may have to pick one of these up in the near future.

My question is how much interior resonance that pipe size transition would produce bolted to an OEM midpipe. Going to 2.5"OD is a big change, and with the power output of both NA and boosted L15A1s I just wonder why it isn't 2"OD or 2.25"OD.

For reference, pipe interior cross sections, assuming 1/16" wall thickness:
OEM midpipe, 1.7"OD, 1.97 square inches (measured via circumference, 5 3/8")
h-fit axleback, 2.5"OD, 4.43 square inches
percent change: 225% of OEM, or 125% more than OEM
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08 VBP L15A1 MT stock
Last edited by polaski; 06-27-2009 at 08:52 PM.
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