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*Active Autowerke E9X M3 Signature X Pipe Kit w/ High Flow Cat & Race Pipe Option*
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10-07-2008, 03:32 AM
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Drives: E92 Jerez DCT M3
Join Date: Jan 2008
Location: Anaheim Hills / Malibu
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When going catless is there a drop off in low end torque by not running primary cats off the header?
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