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E6 Ignition to MSD Distributor Harness; This harness eases the installation of your E6 ignition by providing you with all the connections needed to easily integrate your E6 ignition with an MSD distributor.

Communication Cable for FAST XFI and E7 Systems; This five foot long communication cable provides the link between our 30184 conversion cable to FAST E7 and XFI systems. This cable features a Weatherpak connection on end and a serial bus connection on the other.

Serial to USB Conversion Cable for FAST XFI and E7 Systems; This serial to USB conversion cable provides the link between your laptop and our 30104 five foot long communication cable. This cable features a USB connection on end and a serial bus connection on the other.

Fuel Pump Harness w/ Solid State Relay for FAST EZ 2.0 Fuel Injection Systems; Equipped with a solid state relay, this harness allows the user to add fuel pump control to a FAST EZ-EFI 2.0 fuel injection system.

XFI Main Harness Connector Kit; This kit works well for installers who like to have back-up parts or whose needs require the most flexibility in order to integrate factory components or pre-existing aftermarket harnesses into our XFI ECU.

Denso Fuel Injector Adapter Harness; This fuel injector adapter harness adapts the FAST 32107 242 Lb/Hr LS3 Fuel Injector to a non-Denso fuel injector harness. Kit includes one pre-assembled adapter with pigtail. Requires user to terminate pigtail to injector harness.

Denso Fuel Injector Adapter Harness - Set of 8; These fuel injector adapter harnesses adapt FAST 32107 242 Lb/Hr LS3 Fuel Injectors to a non-Denso fuel injector harness. Kit includes eight pre-assembled adapters with pigtails. Requires user to terminate pigtails to injector harness.

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.

XFI Oxygen Sensor Harness; This harness connects the oxygen sensor to the main wiring harness for XFI ECU's.

XFI Harness for GM TPI Sensors.; XFI Main Harness 301100 fits GM TPI or weatherpack style sensors.

XFI Harness for GM LT1 Sensors.; XFI Main Harness 301101 is great for conversions from carburetor to fuel injection or existing LT-1 based projects. Terminals are generally LT-1 based.