Holley MPFI Kit Terminator X Max With 4R70W Transmission Control Mustang 302W/ 351W/ 460 1998-2004



  • 3.5" LCD Display Screen
  • Boost And Nitrous Control
  • Plug And Play Installation
  • On-Board Diagnostics
MSRP $1,548.00
You save 10%

Holley Terminator X Max EFI Kit for 1998, 1999, 2000, 2001, 2002, 2003 and 2004 Mustangs with 302W, 351W and 460 engines and 4R70W transmissions.

Modern technology can take old-school parts to the next level! This Terminator X-Max MPFI Kit (550-944) from Holley is a plug and play upgrade for your engine and transmission. It will bring your Mustang into the modern age, with a range of performance and maintenance features!

Features and Benefits:
- LSU 4.9 Wideband Oxygen Sensor by Bosch
- Built-In 1 Bar MAP Sensor
- Plug and Play Ignition Capability when using Dual Sync and Hyperspark Distributors
- 4 inputs 12v, Ground, 5v and Frequency
- Boost Control and Nitrous Control
- Advance Tables
- On-Board Diagnostics
- 3.5in LCD Display Screen
- Data Logging
- 4R70W Transmission Control
- Boost by Gear
- Adjust Line Pressures
- Torque Converter Lock-Up Adjustability

Do away with your factory ECU (Engine Control Unit) and switch to Holley’s Terminator X Max EFI Kit (550-944) for all 302w/351w/460 Ford engines with 1998-2004 4R70W transmission. The Holley Terminator X Max EFI Kit is a great upgrade to squeeze out every bit of horsepower from your 302w/351w/460 Ford engine.

The Terminator X has many functions that you can adjust to better fit your build compared to a non-adjustable factory ECU where settings stay locked. Terminator X features real-time fuel learning comes with a 1 bar MAP sensor and 4 programmable inputs and outputs.

Those inputs and outputs are great for running electric fans, boost control, nitrous control and so much more. All the features and settings can be seen in car with the included 3.5in LCD screen. The included LCD screen also has Calibration Wizard to help you set up your Ford 302w/351w/460 engine.

The Holley Terminator LCD screen also acts as an onboard diagnostic tool like engine status, wideband, TPS calibration, crank signal and cam signal. The Terminator X Max also includes transmission control functions for 1998-2004 4R70W automatic transmissions. You will be able to adjust shift points, line pressure, boost pressures by gear, and more.

This Kit Includes:
- Terminator EFI ECU
- Terminator Hand-Held Controller
- Main Power Harness
- Injector Harness
- Input/Output Harness
- Can Power Harness
- Can Extension Harness
- Wideband Oxygen Sensor
- Oxygen Sensor Weld-in Bung
- 4R70W Transmission Controller
- Installation Instructions

Vehicle Fitment:
- 302W/351W/460 with 1998-2004 4R70W transmission

California Residents: Proposition 65 Warning

Note: This item is not CARB (California Air Resource Board) exempt and is not legal for sale or use in the state of California.

Installation Difficulty


Advanced skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

Only registered users can ask/answer questions. Please sign in or create an account.
Write Your Own Review
Only registered users can write reviews. Please sign in or create an account.