BMW 3-Series (E90 E92) Forum - View Single Post - candid review of bmw performance power kit for n55

davidwarren · 08-02-2013, 12:18 PM

this is probably a stupid question, but how does the PPK alone generate exhaust overrun (burble)?

08-02-2013, 12:18 PM	#3
davidwarren Captain 187 Rep 670 Posts Drives: 328,325, 325, 335, X5, 640 GC Join Date: Dec 2011 Location: Louisville, ky iTrader: (0)	this is probably a stupid question, but how does the PPK alone generate exhaust overrun (burble)? __________________ 2010 335i e90 Le Mans Blue/Chestnut Brown \| M-Sport \| 6MT
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