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      03-16-2012, 01:26 PM   #8
TSM330i
2006 330i, TSM, Black, manual, sport
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Drives: E90 330i, E86 Z4 3.0si
Join Date: Nov 2005
Location: Chester Springs, PA

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I would think you would be able to add a high-flow cat to any exhaust. These would get rid of the pre-cats obviously. I'm pretty sure O2 sims are already being produced by another vendor so no problem there.

As for pros/cons - I'm not sure what you mean.

Cost - Obviously they'd like to keep the cost down or no one will buy them. Right now the only SS headers available are from Supersprint and they cost a fortune.
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2006 330i, TSM, Black, Sport, JIC Cross Coil-Overs, UUC Sways, 18" Advan RS, Mich PSS 255/265, BMW Electric Steering Wheel, Rogue shifter, M-Tech front, CF emblems, Dinan TB, Intake, exhaust, strut bar, Stoptech BBK, LSD, M3 susp., LUX 5, CF Hood and CSL, Sparco Seats, AA tune, CF Roof