Wirelessly connect your JB4 to your phone!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For JB4 systems produced 2017 and later. Please check board diagrams to properly identify your JB4 before ordering.
Wirelessly connect your JB4 to your phone!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For JB4 systems produced 2017 and later. Please check board diagrams to properly identify your JB4 before ordering.
Plug & play power — gain up to 100 horsepower on a stock car, 160+ horsepower on a modified car!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Not for sale or use in the state of California.
This product was last offered at the strikethrough price on
05-19-2026
Alter parameters and fine-tune — wirelessly!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For use with N54 JB4 systems and any JB4 manufactured prior to 2017. Please check board diagrams to properly identify your JB4 before ordering.
This product was last offered at the strikethrough price on
05-12-2026
Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Version 1.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This add on kit for BMW N54 engines allows your JB4 to "2step" the engine
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Plug & play power — gain up to 40 horsepower in under one minute! 50 state legal performance!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
CARB Approved - Legal in All 50 States! CARB certified for sale in all 50 states
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.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms