JB Plus BMW N20 & N55 Quick Install TunerPlug in up to 35 extra wheel horsepower in seconds! Finally, our popular and well proven JB Plus quick install tuner is available for N20, N26, and N55 applications! Boost is user adjustable up to 4psi over stock providing gains up to 25 wheel horsepower and 35 wheel torque on the N20 N26 motor and up to 35 wheel horsepower and 45 wheel torque on the N55 motor. Timing and fueling remain managed seamlessly by the DME, preserving all factory safety
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