BMW M3 Forum (E90 E92) - View Single Post

JsL · 08-20-2015, 08:56 PM

Take a video of it revving. People on here can tell you quickly if it's Stock, ACM Mod (bypass) or OEM Mod (perforated pipe).

08-20-2015, 08:56 PM	#2
JsL Major 459 Rep 1,266 Posts Drives: 2011 AW M3 ZCP Join Date: Dec 2013 Location: SF Bay Area iTrader: (2)	Take a video of it revving. People on here can tell you quickly if it's Stock, ACM Mod (bypass) or OEM Mod (perforated pipe).
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