Unlock additional power and performance with the JB4 tuner
Unlock additional power and performance with the JB4 tuner
Remove the dead area from your throttle pedal.
Eliminate the delay in throttle response times with a simple XLR addition to your BMW! Allows for Bluetooth connectivy for easy App based control.
Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash.
Version 1.
Max gains of up to +45 HP and +55 lb-ft TRQ (Crank); +40 HP and +50 lb-ft TRQ (Wheel).
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This product was last offered at the strikethrough price on
07-31-2026
Unlock the hidden potential from your BMW with a safe and easy to use module from RaceChip
A piggy back tuner that allows you to adjust throttle response for peak performance.
Add an Install Kit to Your Motiv ReFlex Control Unit!
Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash. Includes JB4 side repair harness molex pigtail.
Increase of +90 Horsepower, and +95 Torque! Eliminate top speed limiter, Increased throttle response. W.2 Tunes are designed for vehicles with performance high-flow exhausts!
Increase of +70 Horsepower, and +75 Torque, Eliminate top speed limiter, Increased throttle response. W.1 Tunes are designed for completely stock vehicles with no other modifications!
2025+
Increase power without sacrificing reliability
This product was last offered at the strikethrough price on
08-03-2026
Upgrade From Your Outdated Batch-Fire Injector Controller!