FAST XFI optional harnesses allow you to utilize your EFI system to its fullest capabilities. These premium constructed wires provide the connections for fan and fuel pumps, a VSS and auxiliary shaft, an analog input, power adders, and more. Connect your XFI system with genuine FAST optional harnesses and extend your vehicle's performance.

More From This Category

FAST Single Precision 0-100 PSI Sensor and Harness Kit

FAST Single Precision 0-100 PSI Sensor and Harness Kit

$419.31

FAST Classic Main Universal Harness

FAST Classic Main Universal Harness

$858.24

FAST XFI Fuel Injector Harness for SBC, BBC, LT1 and For Chrysler Small Block, B and RB

FAST XFI Fuel Injector Harness for SBC, BBC, LT1 and For Chrysler Small Block, B and RB

$327.02

Proflow Fuel Injector Wiring Plug Bosch EV1 Wired w/Lead

Proflow Fuel Injector Wiring Plug Bosch EV1 Wired w/Lead

$4.08

FAST XFI Fuel Inector Harness for 4 Cylinder Engines w/ Minitimer Connector Injectors

FAST XFI Fuel Inector Harness for 4 Cylinder Engines w/ Minitimer Connector Injectors

$203.62