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      07-05-2011, 09:46 PM   #48
First Lieutenant

Drives: 2006 BMW 330i, cosmetic mods
Join Date: Mar 2011
Location: Tulsa, Oklahoma

Posts: 348
iTrader: (0)

Ok this is very tempting.
I have a 330i, I'm getting the performance exhaust installed soon. Now if I remove the primary cats.

Couple Q's:

How much more louder will it be with the PE?

The O2 sim, is there a DIY for the install?

With PE primary cat delete BMS PBX Charcoal delete KandN much HP gain do you think I'll gain? Just an estimate?