When upgrading from a GEN3 to GEN4 ECU, the secondary set of fuel injectors are now controlled from a Big Drive which is enabled from the Boost connector on the main engine harness.
Our CO2 solenoids are when you want the ultimate in precision CO2 or boost pressure control over your boosted engine combination. This is for the CO2 solenoid block only and the wire harness can be purchased separately.
