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      02-06-2013, 01:20 AM   #15
Mr. Nice Says Hello
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Drives: BMW M3 | X5 xdrive 35i MSport
Join Date: Dec 2008
Location: USA

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Originally Posted by flipm3 View Post
By deleting the secondary cats, I'd imagine the gains to be rather minimal on an XPipe that already deletes primary cats. If ever it might make the car smell a minute amount more, increased volume, increase rasp, and possibly eek out a few more ponies.

I think the biggest determining factor would be the muffler. I think there are exhaust setups out there that sound very clean, classy, and quiet with primary cat deletes. Akrapovic, Evolve Automotive, and Supersprint are the three that come to mind that are all high-end top quality systems, but in no way do they sound harsh or overly aggressive.
I agree, the only thing is that the akra is bit to quite for me. My friend had a challenge race and akra and it was quite, but ALOT of drone. I agree the exhaust will refine the sound, and there are ALOT of different setups. (I have been through so many)

Evolve E600 BMW E92 M3 | BMW E70 X5 xdrive35 M-sport