BMW M3 and BMW M4 Forum - View Single Post - Made a trip to Cali to swap my JB4 for VF Hex tune

BMW M4 PWR · 06-02-2016, 11:20 AM

A flash can actually manipulate and shift the curve up top better by changing the very factory tuning parameters a piggyback can only response to. That's why. Albeit the JB4 is good at what it's designed for...

06-02-2016, 11:20 AM	#91
BMW M4 PWR Major 491 Rep 1,012 Posts Drives: Austin Yellow 6-spd manual M4 Join Date: Apr 2015 Location: MD/DC metro area iTrader: (0)	A flash can actually manipulate and shift the curve up top better by changing the very factory tuning parameters a piggyback can only response to. That's why. Albeit the JB4 is good at what it's designed for...
	Appreciate 1 Quote