BMW M3 Forum (E90 E92) - View Single Post - What are the big differences between stock X-pipe and aftermarket?

s4play · 05-14-2013, 03:36 PM

hey question for all your exhaust pros out there:

How come no one has suggested leaving both sets of cats and ONLY removing the resonators on the X-pipe? Has this been done before and the sound result?

I'm leaning 90% to going with the Sport pipes that slip on after the primary cats since there is no CEL risk and I will gain some sound?

I am still running the stock filter too so perhaps I should get a drop in filter as well?

05-14-2013, 03:36 PM	#36
s4play Car Tuning Geek 580 Rep 1,475 Posts Drives: too many rides.... Join Date: Dec 2006 Location: Norcal iTrader: (0)	hey question for all your exhaust pros out there: How come no one has suggested leaving both sets of cats and ONLY removing the resonators on the X-pipe? Has this been done before and the sound result? I'm leaning 90% to going with the Sport pipes that slip on after the primary cats since there is no CEL risk and I will gain some sound? I am still running the stock filter too so perhaps I should get a drop in filter as well? __________________ 04 GPW/Onyx NSX 08 Rio Yellow s2000 CR 16 F80 Dakar M3 15 Ferrari 458 Spider
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