PCM Flash Programmers / EFI Engine Management

Plug and play for Holley Avenger, Terminator X, HP, and Dominator ECU fuel and oil pressure inputs. 1/8" NPTFeatures:•Plug and play for both fuel and oil pressure inputs with Holley EFI systems•Stainless steel construction•Comes with...

*Fits Ford 2V Mod Motor w/ Stock Coils and EV1 injectors Introducing Terminator X and X Max Kits for the Modular Ford engine. These new kits will plug and play with either 2V or 4V Mod Motors commonly found in 1996-2004 Mustangs, 1995-2006 F150, or...

Clearance/Closeout 1 In stock, no refunds or returns on clearance items.  *Fits Ford 4V Mod Motor w/ Stock Coils and EV1 injectors   Introducing Terminator X and X Max Kits for the Modular Ford engine. These new kits will plug and play...

The Holley EFI Pro Dash measures 13.44" wide, 5.81" tall and 1.25" deep. The Pro Dash is completely customizable for use in a variety of motorsports applications. It features a 12.3" 1280x480 resolution low glare, high brightness, high contrast, full...

  This is pre-order only, shipments expected to go out late July early August 2026   Holley's new 6.86" Pro Dash delivers over 200 monitoring channels of reliable real-time data in a more compact, full HD package suitable for nearly any...

Holley's new 6.86" Pro Dash delivers over 200 monitoring channels of reliable real-time data in a more compact, full HD package suitable for nearly any motorsports application. Be assured that the Holley EFI 6.86" Pro Dash will deliver the vitals you...

The Holley EFI 5-inch Digital Dash comes out of the box, ready to plug and play with your Gen 1 Sniper EFI, Terminator X or X MAX, and Holley EFI Dominator or HP ECU. The 5-inch digital touch screen display is pre-loaded with 3 easy to read layouts...

This 3.5" Touch Screen LCD Handheld Controller gives you access to a wide range of tuning options. Additionally this display can be used as a fully customizable data monitor! With this 3.5" display your system vitals can be viewed with a quick glance!...

Replacement Holley EFI NTK Wide band Oxygen sensor. This sensor is a direct replacement for Holley HP, Dominator, Avenger and Terminator EFI systems. Each Sensor is hand calibrated to insure accurate readings when used in conjunction with your Holley EFI...

Replacement Holley EFI, Bosch Wide Band Oxygen Sensor.This sensor is a direct replacement for Holley HP, Dominator and Avenger EFI systems. Each Sensor is hand calibrated to insure accurate readings when used in conjunction with your Holley EFI system...

The eight channel coil driver module is a "dumb coil" driver module that plugs into the main harness, which is needed when running the factory coils. Contains two 4-channel drivers, requires on an eight cylinder engine. Eight channel Works with...

Have you been searching for a reason to discard your old noisy mechanical speedometer cable? If so, the Holley GPS Module for our 7" Digital displays should be the next addition to your project vehicle. Featuring a simple plug and play installation, this...

Main harness for 99-04 2 & 4 Valve Ford Modular (4.6 & 5.4L) Engines. For Terminator X, X Max, HP and Dominator EFI systems. (Main engine harness only)

Ford V8 Injector Harness for Ford USCAR / EV6 style Fuel Injectors (Evenly Spaced) Works with Holley EFI systems Terminator X, X Max, HP and Dominator main harnesses. Eliminates the need for injector adapters, just swap injector harnesses and go!

Great for applications requiring minimal Input/output wiring. 4 Output Wires 4 Input Wires Connector J1A/B Inputs/Outputs Auxiliary Harness for Terminator X, HP, and Dominator EFI systems

Used when adding a second wide band oxygen sensor to a Dominator EFI installation. For use with Bosch 4.2 and NTK wideband sensors. Features: J2A Connector #2 Wide band oxygen sensor harness (Fully Terminated) 23 user programmable input wires with...

The CAN to USB communication cable provides the user with real tuning time access to the ECU. This cable can be used with Holley EFI, Sniper EFI, and Terminator X Tuning Software. Which can be downloaded for free from the Support section of our...

Unlock the full potential of your Terminator X EFI system with the Terminator X EFI Bluetooth Module - the ultimate tool for wireless tuning and real-time engine monitoring. This advanced module connects via Bluetooth, allowing you to adjust and optimize...

  4-BANK E-PROM CHIPS FOR EEC-IV & EEC-V FORD CARS Experience performance with the SCT 6600 Eliminator Switch Chip. Switch between custom tunes with ease with switch tune cable (not included). Cable not included and must be...

Easy to install with one touch lever. PVC suction mount arm adjusts vertically and provides 360 degree rotation.