FT550 4 Cylinder Universal B Expansion Harness by Fueltech The FuelTech Universal 4 cylinder B FT550 expansion harness compliments the Universal 4 cylinder A harness with the options to control up to 8 injectors staged sequentially, have a direct connection for inbuilt gear controller as well as the additions to inputs and outputs. The harness comes with a relay with a built-in fuse for power supply to the extra 4 injectors. The injectors are to be of high impedance only. The Universal 4-cylinder B harness has a label for each connector and the insulation is heat, moisture, and oil resistant. Please Note: This Harness is only compatible with the FT550 ECU and must be used along with FT450/550 4 CYLINDER UNIVERSAL A HARNESS. Features Expansion Harness to FT550 sequential injection for 4 cylinder application with 8 injectors Harness to be used along with FT450/550 4 CYLINDER UNIVERSAL A HARNESS Connectors FT550 (Connector B) 4 EV1 injectors (for high impedance injectors only) FT CAN B connector GearController sensor connector Extra INPUTS connector to custom wire up to 5 additional input channels for the engine or chassis data logging (i.e. driveshaft RPM, trans brake button, suspension travel sensors, input shaft RPM, staging button, and much more) – Mating connector kit included Extra OUTPUTS connector to custom wire up to 8 additional outputs (i.e. boost control solenoids, trans brake solenoid, dump and lockup valves, gear shift, nitrous stages, and more) Mating connector kit included Relay with the fuse for injectors Applications Universal What’s In The Box? FT550 4 Cylinder Universal B Expansion Harness Warranty Fueltech’s Standard 1-Year Limited Warranty