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      01-13-2012, 09:59 PM   #23
Major General

Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

iTrader: (3)

I bought the apparently identical one sold by Top Speed. It fit fine, but is too loud for me so I am modifying it to add four resonators. I know it did not cost $1000 or more like some of the other x-pipes but the quality looks fine to me. I hope to tack weld the resonators in place this weekend and then have them tig welded next week.

After that, I will consider whether to add a pair of high flow metallic core 200 cell cats. I would put the high flow cats where the factory primary cats are located and use 02 extenders with restrictors in the hopes that OBD2 readiness would be preserved. Many x-pipes have high flow cats where the factory secondary cats are located and this prevents OBD2 readiness since the rear 02s would be located before rather than after the cats.

I bought the car as a practical daily driver that my wife would ride in since she does not really like my 500+ rwhp 500+ lb rwtq catless turbo E36 M3. If I make the E90M3 too loud and too smelly, she won't ride in it, either.