FAST offers several main harness options to aC-Commodate most customers' needs. The XFI Main Harness is responsible for connecting your XFI ECU to sensors as well as digital dashes, EGT modules, and various optional accessories. The Main Harness also handles communication between the ECU and ignition devices. Main harnesses are available in TPI, LT-1, LS-1 through 9 (including truck/suv designs), Modern Hemi, Carburetor Conversions and even Rear-Engine Dragsters and Boats. FAST also offers Main Harnesses that come terminated on the sensor side but non-terminated on the ECU side to allow for a truely custom fit. All terminals, seals and connectors are available individually, so don't hesitate to try your hand at crafting your own custom harness from start to finish.
This Part Fits:
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2007 | Cadillac | CTS | V |
| 2002-2005 | Chevrolet | Avalanche 1500 | Base |
| 2005-2006 | Chevrolet | Avalanche 1500 | LS |
| 2005-2006 | Chevrolet | Avalanche 1500 | LT |
| 2004-2006 | Chevrolet | Avalanche 1500 | Z66 |
| 2002-2006 | Chevrolet | Avalanche 1500 | Z71 |
| 2014-2015 | Chevrolet | Camaro | Z/28 |
| 1998-2002 | Chevrolet | Camaro | Z28 |
| 1998-2002 | Chevrolet | Camaro | Z28 SS |
| 2013 | Chevrolet | Corvette | 427 |
| 2003 | Chevrolet | Corvette | 50th Anniversary Edition |
| 2003 | Chevrolet | Corvette | 50th Anniversary Edition Pace Car |
| 1997-2007 | Chevrolet | Corvette | Base |
| 1998 | Chevrolet | Corvette | Indianapolis 500 Pace Car |
| 2001-2004,2006-2013 | Chevrolet | Corvette | Z06 |
| 2011 | Chevrolet | Corvette | Z06 Carbon |
| 2003-2007 | Chevrolet | Express 1500 | Base |
| 2003-2007 | Chevrolet | Express 1500 | LS |
| 2006-2007 | Chevrolet | Express 1500 | LT |
| 2003-2007 | Chevrolet | Express 2500 | Base |
| 2003-2006 | Chevrolet | Express 2500 | LS |
| 2006 | Chevrolet | Express 2500 | LT |
| 2003-2005 | Chevrolet | Express 3500 | Base |
| 1999-2005 | Chevrolet | Silverado 1500 | Base |
| 1999-2006 | Chevrolet | Silverado 1500 | LS |
| 1999-2007 | Chevrolet | Silverado 1500 | LT |
| 2007 | Chevrolet | Silverado 1500 | LTZ |
| 2002-2004,2006-2007 | Chevrolet | Silverado 1500 | WT |
| 2004 | Chevrolet | Silverado 1500 | Z71 Off-Road |
| 2007 | Chevrolet | Silverado 1500 Classic | LS |
| 2007 | Chevrolet | Silverado 1500 Classic | LT |
| 2007 | Chevrolet | Silverado 1500 Classic | WT |
| 1999-2004 | Chevrolet | Silverado 2500 | Base |
| 1999-2000 | Chevrolet | Silverado 2500 | LS |
| 1999-2000 | Chevrolet | Silverado 2500 | LT |
| 2004-2005 | Chevrolet | Silverado 3500 | Base |
| 2003-2006 | Chevrolet | SSR | Base |
| 2000-2001,2006 | Chevrolet | Suburban 1500 | Base |
| 2000-2006 | Chevrolet | Suburban 1500 | LS |
| 2000-2006 | Chevrolet | Suburban 1500 | LT |
| 2004-2006 | Chevrolet | Suburban 1500 | Z71 |
| 2000-2001,2006 | Chevrolet | Tahoe | Base |
| 2000-2006 | Chevrolet | Tahoe | LS |
| 2000-2006 | Chevrolet | Tahoe | LT |
| 2003-2006 | Chevrolet | Tahoe | Z71 |
| 2006-2009 | Chevrolet | Trailblazer | SS |
| 2003-2004 | Chevrolet | Trailblazer EXT | LS |
| 2003-2004 | Chevrolet | Trailblazer EXT | LT |
| 2003-2004 | Chevrolet | Trailblazer EXT | North Face |
| 2004 | GMC | Envoy XL | SLE |
| 2004 | GMC | Envoy XL | SLT |
| 2003-2006 | GMC | Savana 1500 | Base |
| 2006 | GMC | Savana 1500 | LS |
| 2006 | GMC | Savana 1500 | LT |
| 2003-2005 | GMC | Savana 1500 | SLE |
| 2003-2007 | GMC | Savana 2500 | Base |
| 2003-2005 | GMC | Savana 2500 | SLE |
| 2004-2007 | GMC | Savana 3500 | Base |
| 2005 | GMC | Savana 3500 | SLE |
| 2002-2005 | GMC | Sierra 1500 | Base |
| 2002 | GMC | Sierra 1500 | HT |
| 1999-2003,2006 | GMC | Sierra 1500 | SL |
| 1999-2007 | GMC | Sierra 1500 | SLE |
| 1999-2006 | GMC | Sierra 1500 | SLT |
| 2002-2007 | GMC | Sierra 1500 | WT |
| 2007 | GMC | Sierra 1500 Classic | SL |
| 2007 | GMC | Sierra 1500 Classic | SLE |
| 2007 | GMC | Sierra 1500 Classic | WT |
| 1999-2001 | GMC | Sierra 2500 | SL |
| 1999-2001 | GMC | Sierra 2500 | SLE |
| 1999-2001 | GMC | Sierra 2500 | SLT |
| 2001 | GMC | Sierra 2500 HD | SL |
| 2001 | GMC | Sierra 2500 HD | SLE |
| 2001 | GMC | Sierra 2500 HD | SLT |
| 2001 | GMC | Sierra 3500 | SL |
| 2001 | GMC | Sierra 3500 | SLE |
| 2001 | GMC | Sierra 3500 | SLT |
| 2006 | GMC | Yukon | SL |
| 2000-2006 | GMC | Yukon | SLE |
| 2000-2006 | GMC | Yukon | SLT |
| 2006 | GMC | Yukon XL 1500 | SL |
| 2000-2006 | GMC | Yukon XL 1500 | SLE |
| 2000-2006 | GMC | Yukon XL 1500 | SLT |
| 2000-2001 | GMC | Yukon XL 2500 | SLT |
| 2003-2007 | Hummer | H2 | Base |
| 1998-2002 | Pontiac | Firebird | Formula |
| 1998-2002 | Pontiac | Firebird | Trans Am |
| 2004-2006 | Pontiac | GTO | Base |