Relays are a required item whenever you want to use your XFI ECU to control a high-current device, such as a fuel pump or nitrous solenoid with one of its low-current outputs. FAST offers relays to cover many applications. When choosing a relay, it's very important that the relay current rating (shown in amps) be appropriate to the current requirements of the device you intend to control with it. So, if you're in need of a relay--think FAST relays.

More From This Category

FAST Fuel Injection System, EZ-EFI 2.0 Self-Tuning, Black Anodized Throttle Body, 4-barrel Square Bore Flange, Kit

FAST Fuel Injection System, EZ-EFI 2.0 Self-Tuning, Black Anodized Throttle Body, 4-barrel Square Bore Flange, Kit

$8,333.32

FAST 48 in. Exhaust Gas Temperature Probe

FAST 48 in. Exhaust Gas Temperature Probe

$329.28

FAST Replacement Magnetic Pickup for 301436 and 301437 Driveshaft Speed Sensor Kits

FAST Replacement Magnetic Pickup for 301436 and 301437 Driveshaft Speed Sensor Kits

$277.65

FAST Firewire GM Circle Track Wireset with Heat Sleeve

FAST Firewire GM Circle Track Wireset with Heat Sleeve

$371.29

FAST XFI GM HEI Connector Kit

FAST XFI GM HEI Connector Kit

$35.46

FAST MAP Sensor, 5 Bar Range, For Ford, TPS Sensor, Air Temp. Sensor, Coolant Temp. Sensor, Kit

FAST MAP Sensor, 5 Bar Range, For Ford, TPS Sensor, Air Temp. Sensor, Coolant Temp. Sensor, Kit

$622.80