Holley EFI LS (58X/4X) Engine Main Harness for HP EFI/Dominator EFI 558-103 LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI This harness has been designed to interface with 58x crank and 4x cam sensors. These engines are commonly...

Holley EFI Terminator X 120 LB/HR EV6 Fuel Injectors 522-128XFM Terminator X Flow Matched High Impedance Fuel Injectors are dynamic flow matched within 1%, resulting in extremely precision and consistent injector characteristics. These injectors provide...

Holley HP EFI GM LS 24x  ECU & Harness Kit w/ Bosch O2 550-602 Features & Benifits: Intuitive software and features designed for novice and veteran tuners  Fuel and Ignition Control for 4, 6, 8, 10 cylinder even fire engines ...

Holley HP EFI GM LS 24x ECU & Harness Kit w/ NTK O2 550-602N Features & Benifits: Intuitive software and features designed for novice and veteran tuners  Fuel and Ignition Control for 4, 6, 8, 10 cylinder even fire engines  Capable of...

Holley HP EFI GM LS 58x ECU & Harness Kit w/ Bosch O2 550-603 550-602 Features & Benifits: Intuitive software and features designed for novice and veteran tuners  Fuel and Ignition Control for 4, 6, 8, 10 cylinder even fire engines ...

Holley HP EFI GM LS 58x ECU & Harness Kit w/ Bosch O2 550-607 Features & Benifits: Intuitive software and features designed for novice and veteran tuners  Fuel and Ignition Control for 4, 6, 8, 10 cylinder even fire engines  Capable of...

Holley HP EFI GM LS 58x ECU & Harness Kit w/ NTK O2 550-603N Features & Benifits: Intuitive software and features designed for novice and veteran tuners  Fuel and Ignition Control for 4, 6, 8, 10 cylinder even fire engines  Capable of...

Holley Terminator GM LS 4.8,5.3,6.0L 24x MPFI Kit 550-614 Features: For 1997 to 2007 4.8/5.3/6.0 truck engines with 24x crank reluctor/span> Kit includes everything you need to control your stock or mild LS Bosch wideband oxygen sensor included...

Holley Terminator GM LS 58x MPFI Kit w/ DBW & Trans Control 550-613 Features: For GM LS2/3 engines and 2007 to current 4.8/5.3/6.0 truck engines with 58x crank reluctor, drive-by-wire, and 4L60/4L80E transmissions Kit includes everything you need to...

Holley Terminator X 120 lb/hr  EV6 Fuel Injector Single 522-121X Terminator X High Impedance Fuel Injectors feature a precision lapped disc valve, high-quality brass windings, and high-temp o-rings. These injectors provide excellent linearity with...

Holley Terminator X 42 LB/HR EV6 Fuel Injectors 522-428XFM Terminator X Flow Matched High Impedance Fuel Injectors are dynamic flow matched within 1%, resulting in extremely precision and consistent injector characteristics. These injectors provide...

Holley Terminator X GM Gen V LT Early Standalone ECU & Wire Harness 550-1600 Take control of your GM Gen V LT1, L83, or L86 engine with Terminator X! Do not settle for a factory ECU with a cumbersome tuning interface when you can have complete...