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      02-01-2013, 06:46 AM   #6
Jerain
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Drives: E92 335i 6MT
Join Date: Nov 2012
Location: Europe

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With only a slip-on you don't get much extra sound. With the double cats and resonators still in place, it holds back most of the sound... I'm driving a full OEM exhaust but without the first cats, sounds good and not too loud. Also it brings a bit more HP.