Unlock the hidden potential from your BMW with a safe and easy to use module from RaceChip
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.
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.
Easy to install, easy to use boost controller - up to 30HP, 40lb/ft gain!
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This product was last offered at the strikethrough price on
05-02-2026
Next-Gen Power Delivery with OEM-Level Integration - up to +55 HP / +60 TQ
2X Entries For Our 25th Anniversary Sweepstakes!
For later models with the Gen2 B48 engine (B46D / B46TU)
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!