Performance car owners want fuel economy and throttle response. That's why they upgrade to the EZ-EFI fuel pump conversion for mpg improvement. FAST has the relay harnesses to compliment this system. These plug-and-play harnesses are simple to install, and they'll hook you up to the precise amount of fuel for optimal performance.

More From This Category

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

$336.53

FAST Wiring Harness W/Relay, Fast M Ain

FAST Wiring Harness W/Relay, Fast M Ain

$763.88

FAST Vehicle Speed Sensor/Traction Control Connector Kit for XFI

FAST Vehicle Speed Sensor/Traction Control Connector Kit for XFI

$51.76

Proflow Fuel Injector Wiring Plug EV1 Bosch Style 2 Pin Include Terminals & Boot

Proflow Fuel Injector Wiring Plug EV1 Bosch Style 2 Pin Include Terminals & Boot

$4.39