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      03-16-2012, 02:26 PM   #8
TSM330i
2006 330i, TSM, Black, manual, sport
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Drives: 2015 GTI, E86 Z4 3.0si Racecar
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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2015 GTI S, 6M, LP, Volk TE37SL 17x8.5, Michelin PSS 245/40, HPA SHS Coil-Overs, Peloquin LSD, Sachs SRE, Eurocode F/R Sway Bars, SuperPro Control Arms, Remus Catback, APR Stage 1 Tune, APR CAI, Aero Force Gauge Pod, APR Boost Gauge, Kersher Front Lip, Short Shifter, Tyrolsport Deadset, Stoptech BBK, HPA Dogbone
2008 BMW Z4 3.0si Coupe - because racecar