A piggy back tuner that allows you to adjust throttle response for peak performance.
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.
Proprietary tune box designed specifically for the R55/R56/R57/R58/R59 S, GP, & JCW up to 18-22 HP / + 28-32 TQ
This product was last offered at the strikethrough price on
09-01-2026
Get up to +28 hp and +47 lb-ft through a safe and easy to use tuning module from Racechip
2025+
Plug-and-play performance solution - Enjoy additional HP and Torque without voiding warranty!
Average gain of 19 horsepower and 73 lb-ft of torque at the crank