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.
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.
Brand:
ES#:
3508698
Mfg#:
JB4-BT
In Stock
$149.00
This product was last offered at the strikethrough price on 05-12-2026
Plug & play power — gain up to 40 horsepower on a stock car, 70+ 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.
Brand:
ES#:
3508709
Mfg#:
JB4-S55
In Stock
$599.00
This product was last offered at the strikethrough price on 05-19-2026
Adds a high fuel pressure connection to the JB4 for S58 platforms, allowing direct control of fuel pressure and fuel trims
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Lifetime Replacement
