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BMW M4 STAGE 2+ CUSTOM FILE I know these cars well and their capabilities very well, yet when I drive one that's tuned to perfection like this it still WOWs me time and time again!! The responsiveness and bottom end torque from these S55 engines is just mind bending!! Coupled to DCT Gearbox and we achieve sheer perfection!! Allowing the ECU to push more timing with a healthy fuel makes these cars soooo strong when your octane gets into the triple digits you actually have a supercar slayer!! These Bmw M3's and M4's are no joke with mapping let me assure you, very VERY little will stay close to you with the throttle floored!! Awesome car and a cherry on top of a crazy busy week last week!! Smiles for Miles at BoosTech SA!! 😎 #bmw #m3 #m4 #beast #monster #supercarslayer #car #cars #barnesbros #barnesbrothers #boostech #boostechsa #ecu #software #tuning #specialists