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XFI to XFI 2.0 Firmware Upgrade; Upgrade your XFI unit to XFI 2.0 with a firmware update.

XFI to XFI 2.0 Firmware w/ Case/Enclosure Upgrade; Upgrade your XFI unit to XFI 2.0 with a firmware update. This Upgrade includes a new XFI 2.0 Case to show off your upgrade.

Wiring Harness W/Relay, Fast M Ain; Main harness

Wiring Harness, Fast Fuel Injector; Main harness

2/3 BAR Map Sensor Adapter for XFI TPI and Carb Conversion Harnesses; This connector comes with our 2 and 3 BAR MAP sensors to install them with our XFI 301100 and 301101 harnesses.

FAST Power Adder Wiring Harness for Nitrous and Power Adder Enable/Hold; Connect multiple Nitrous solenoids and take full control over your power adders with the XFI ECU using this kit.

FAST Power Adder Connector Kit for N20 and PA Enable/Hold Functionality; FAST's Power Adder Connector Kit allows you to build your own harness from scratch. Connect multiple Nitrous solenoids and take full control over your power adders with the XFI ECU using this kit.

XIM Connector Kit for GM LS1/LS6; This XIM GM LS1/LS6 Kit comes with just the connectors, terminals and seals to build a harness from scratch. Great for the custom builder, transplant projects or as spare parts.

Analog Input Harness for XFI; This harness allows you to add up to 8 additional inputs to your XFI ECU. This harness is designed to aC-Commodate 0 to 5 volt range sensors that read anything from oil pressure to exhaust gas temperature etc.

XIM Chrysler 6.1L HEMI Connector Kit; The XIM 6.1 L Hemi Connector Kit allows for you to custom tailor the harness length and terminations for your special project. Great option for harness builders and transplant projects.

Analog Input Connector Kit for XFI; This connector kit comes with the mating connector to the analog connector on the main XFI harness and allows you to add up to 8 additional inputs to your XFI ECU.

XIM Chrysler 5.7L HEMI Connector Kit; The XIM 5.7 L Hemi Connector Kit allows for you to custom tailor the harness length and terminations for your special project. Great option for harness builders and transplant projects.