1987-89 Mustang Pro-M EFI Engine Management System by Pro-M

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  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT
  • Pro-M Mustang EFI Engine Management System (87-89) 87-89 KIT

Pro-M's 1987-1989 Mustang EFI engine management system can increase horsepower & tune your Foxbody!

Item #PMA-EFI8789
MPN# 87-89 KIT

Everyday Low Price: $2,449.95

  Ships from supplier by Monday, March 26

Add to cart


  • Direct Replacement EFI Harness
  • Pre-Installed Tune
  • OBD II Compatible


  • Factory Connections
  • Fully Laptop Programmable
  • Dual Wideband Gauge
  • One-Click Tuning

What's in the Box

  • (1) Pro-M EFI Engine Management System

Product Description

Easier Engine Management
This 1987-1989 Mustang Pro-M EFI engine management system is a great way to easily tune your Foxbody! With a fully programmable Pro-M EFI processor, tuning software, and a Foxbody specific engine management harness, this kit helps increase horsepower and engine efficiency. The kit features factory style connectors for a direct replacement bolt on system. There is no need to buy anything else when purchasing this engine management system, no spark controllers, no Boost Timing Module (BTM), no nitrous controller. Everything you could ever want to do to an engine can be controlled with the Pro-M EFI processor! Simply download and fill out the tuner form below to get your custom tune created!

Store Unlimited Number of Tunes
No more towing your Mustang to the dyno as you can write and re-write the processor as many times as you'd like. This software has a feature that copies the existing tune to another file, then runs the engine on that copy. You will then be able to modify the copy any way you'd like on the fly and instantly see the results! This allows you to modify your tune without actually modifying your tune. If you like the results, then save it as your new tune and if you don't like it simply switch back to the original tune!

Innovate Motorsports Dual Air/Fuel Wideband Gauge
Included with this kit is a dual air/fuel wideband gauge from Innovate Motorsports that allows you to monitor each bank independently on a single gauge! Featuring a 2 1/6" diameter housing, the wideband comes with interchangeable black and silver faceplates as well as black and white bezels, for a customized look! For crisp visibility, this wideband offers an OLED display that is user configurable allowing you multiple options on how you want to display the data. Innovate designed this gauge to feature their patented DirectDigital wideband sensor control, which is the only 100% digital wideband air/fuel ratio technology!

-OBDII Compatible
-Fully Laptop Programmable
-Built-In 2 Step Rev Limiter
-Full Control Over Air/Fuel Ratio & Timing
-Simple One-Click Tuning
-Store Unlimited Number Of Tunes
-Easy Forced Induction Tuning
-User Adjustable Rev Limiter
-Individual Cylinder Tuning
-Built-In Electric Cooling Fan Control
-Innovate Dual Digital Wideband Guage
-Self Diagnosing Processor

Emissions Note
This kit is not legal for sale or use in California.

-Fits 1987-1989 Mustang

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Product Videos

Pro-M EFI Engine Management System Install

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

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Product Reviews (1)

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1 of 1 REVIEWS
1 of 1 REVIEWS

By on 9/24/2017
First let me start with this, If you are planning to do anything to a fox body mustang, START WITH THIS!!!! I purchased this system a year ago and continually have been astonished by the control this put in my hands over every operation of the engine. After 15+ years playing with these mustangs this is the only thing that has left me gushing for this long, and there are even more capabilities to this controller that I have yet to utilize. I'm currently running a 306 at 12:1 compression with a nasty camshaft with a ton of overlap. With 200cc heads, trickflo intake, I don't have to tell the fox body guys the drivability problems that come with it on the stock efi set up. What has been truly amazing about the pro-m efi is the streetability of the car now. It has a perfect idle, no surging, and no bucking, and I have total control over the fuel and timing curve. I can tune for street ability below 4000 rpm, and bring it to life above that. Right out of the box it made a drastic difference in performance from the custom chip I was running in the A9L. This is an oem quality must have, is worth every dime, and then some.

Yes, I would recommend this item to a friend!

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Vehicle Applications

Ford Mustang - 1987 (87) - 1988 (88) - 1989 (89)

About This Brand

Pro-M Racing was founded in 1989 by Bob Atwood, a Ford engineer who was instrumental in pioneering mass air technology. Pro-M quickly became the most respected name in the industry, offering the only real practical solution to the restrictive production mass air meters found in most of today's production Mustangs. We manufacture mass air meters in various sizes, shapes, and styles, as both direct bolt-in replacements, and in universal designs, to maximize your engine's horsepower potential, by allowing your engine to breathe to its fullest potential. Each mass air meter is individually calibrated specifically for you Mustang or Lighting application on one of our in-house flow benches specific to your particular application, and fuel injector size, eliminating the need for time consuming and expensive dyno tuning. Others make claims, but only Pro-M Racing possesses both the intellectual and physical properties necessary to calibrate your mass air meter to within two percent of what the OEM considers the perfect baseline.

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