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Alext · 05-30-2009, 12:58 AM

Noticeable gain in turbo spool noise? How is this achieved by a simple drop-in filter? Is the stock filter really that muffling?

05-30-2009, 12:58 AM	#9
Alext Banned 142 Rep 2,042 Posts Drives: B M W Join Date: Apr 2008 Location: Everest iTrader: (2)	Noticeable gain in turbo spool noise? How is this achieved by a simple drop-in filter? Is the stock filter really that muffling?
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