These add on harnesses attach to your JB4PRO system to enable various functions:
B58/S58 FLEX harness lets you attach to an external ethanol sensor and/or pressure sensor, and is required to use the port injection harness add on.
B58/S58 PORT harness plugs into the flex harness to enable port injection.
KIA CPI harness plugs into your existing Kia/G70 JB4PRO harness to enable charge pipe injection (CPI), while the Kia WMI harness allows connection of the JB4PRO to a WMI pump and solenoid.
