BMW M3 and BMW M4 Forum - View Single Post - Exhaust Valve Mod Comparison Video

castilla · 12-05-2014, 05:05 AM

It's only open valves in efficient mode ? Does sound change in sport and sport plus mods?
I didnt understand the purpose of this mod..What will be the difference after doing that mod? In sport and sport plus more sound?

12-05-2014, 05:05 AM	#51
castilla Second Lieutenant 51 Rep 230 Posts Drives: 2014 M4 Join Date: Mar 2012 Location: tr iTrader: (0)	It's only open valves in efficient mode ? Does sound change in sport and sport plus mods? I didnt understand the purpose of this mod..What will be the difference after doing that mod? In sport and sport plus more sound?
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