The OG is back! Fox Body Mustang Holley Terminator X Kit - Overview & Full Explanation (550-937F)

Take control of your 1987-1993 Fox Body Mustang 5.0 and transform the power, efficiency, and drivability with Holley's Terminator X EFI Kit. Don't settle for a factory ECU with a cumbersome tuning interface or pre-programmed tuning chip when you can have complete control of your engine, self-learning fuel strategies, and the proven, race-winning technology of Holley's EFI at a budget-friendly price! The Terminator X features real-time fuel learn, high impedance injector drivers, an integrated 1-bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. The Terminator X comes fully loaded with base maps for common V8 engine combinations to get you out of the garage and on the road/track fast! The 3.5" touchscreen LCD handheld contains an easy-to-use calibration wizard as well as tuning and gauge display functions. Holley EFI's industry-leading, easy-to-use software is provided to allow full laptop access to advanced tuning. Whether you are building a budget beater or a boosted race car, Holley EFI's Terminator X has the features and technology you need at a price that won't break the bank! Learn more by clicking the link below.

*Product Links*

*Watch*

*Chapters*
00:00 - Video intro & explanation.
01:02 - Installation manuals.
02:02 - Terminator X ECU & dedicated power harness.
03:13 - Fuel circuit explanation.
05:22 - Required sensors for Terminator X.
06:23 - Ignition harness.
08:09 - Final thoughts & outro.

*Social*

#lmr #mustang #holleyefi

[CarCommentator]

The way you’ve revived this car is nothing short of extraordinary. Your meticulous attention to detail and expert craftsmanship have created a timeless beauty

[badassforever]

This system is almost perfect. I'm telling you right now skip the headache with the factory IAC and get Ford Fiesta IAC. It will require you to change the plug and re-pin the connector. BUT you will regret ever thinking your car will run good with the stock IAC. After all the money and time i spent setting this system up and still never ever being able to get my car to idle good with a larger cam i switched to the Fiesta IAC and wow. The car is PERFECT. DO IT.

[eljefe]

Waiting on a in depth install from LMR. Like with every other component you guys sell. That would be awesome!

[CapriJake]

I bought this a while back for a foxbody mustang engined Capri i was swapping in the UK, along with all their guages and bunch of other little rebuild bits from LMR. I was worried it would be discontinued! Im going to be installing it in the next few weeks!

[Jv]

Kinda wish i would have gotten this or the sniper 2. The megasquirt is a big learning curve

[literfox]

I wish we would’ve known you guys were working on bringing this back. I just installed the 937 kit and it fit like crap

[last]

Waiting for this to come back but with a Terminator Max Computer to use on a SN95!

[Foxbody_George_]

Dang I wish I would’ve waited to see if this kit came back out. I decided to get the generic small block ford terminator X kit when this foxbody kit was discontinued and the generic kit just looking at the harness I can tell it’s not going to fit as good.

[toranzoM]

Is there an option to substitute an EV6 injector harness instead of the EV1?

[Olds_Pwr]

Are we on the 3rd Terminator X for the Fox Platform because the one that was discontinued a few years ago had a part number as this one, 550-937F. If so, what is different between all 3 kits and the original part number. Thanks.

[Muddy]

When installing an Terminator X, will any of the stock dash still function? Or is the Pro Dash a basic requirement to complete this installation?

[DANA-dr]

Can the Terminator X be calibrated to run a NA 347 stroker (or is it preset to only run a 302/351)?

[ok]

I'm using this kit on a 351w with a holley high ram. How would I use a gm iac and tps sensor with the ford connectors? I have the gm connector pigtails but can't figure out the wiring and repinning.

[MrGAMERBOY]

So my question is what is the differences between the 550-937 and the 550-937F i bought my holley kit before they rereleased this still in the box havent touched it so may reach out to ask if they would swap it out for the F model if its easier to do so

[toranzoM]

Is the inertia switch still functional with these kits?

[nunya]

In the description on your site, it says no laptop required, but can you still do laptop tuning with this particular package?

[Olds_Pwr]

Wish they would have used the original harness and calibrated the computer to work with the Ford components. More plug and play would have been nice overall instead of cutting up the factory harness.

[angryw]

I see you guys stopped selling the pro m. Any reason why? Not a big seller? Owner was difficult to work with?

[whatthefox]

Had to buy the Anderson kit for $2, 500 💔