BMW 3-Series (E90 E92) Forum - View Single Post - DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.

raceyBMW · 07-14-2009, 08:10 PM

HAHA, are you serious? No way was the exhaust flap mod a cause of this. There is no horsepower lost, if anything you actually might gain a tiny amount because of the reduced back pressure at all RPM.

07-14-2009, 08:10 PM	#282
raceyBMW king of the hills 92 Rep 2,915 Posts Drives: 2011 M3 w/ESS55, 2001 540i/6 Join Date: Dec 2006 Location: Arvada, CO iTrader: (1) Garage List 2001 BMW 540i/6 [8.17] 1994 530i [9.00] 2007 335i Coupe [8.37]	HAHA, are you serious? No way was the exhaust flap mod a cause of this. There is no horsepower lost, if anything you actually might gain a tiny amount because of the reduced back pressure at all RPM.
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