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titanle · 06-01-2016, 03:17 PM

Heres a link showing cold start and idle with the exhaust valve bypass mod done. It sounds deeper and throatier at idle. There are also some nice backfires/crackles when revving above 3K rpm.

06-01-2016, 03:17 PM	#2
titanle First Lieutenant 50 Rep 376 Posts Drives: 2010 X6 Activehybrid Join Date: Jul 2012 Location: Vancouver, BC iTrader: (0)	Heres a link showing cold start and idle with the exhaust valve bypass mod done. It sounds deeper and throatier at idle. There are also some nice backfires/crackles when revving above 3K rpm.
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