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SCT X4 Performance Tuner - 6.4 Powerstroke

-Gain up to 160hp & 300 lb-ft
-Includes 4 preloaded tunes
-5.5" full color LCD screen
NOTE: This product has the following shipping restriction(s):
  • This product is not available for shipping to California
Pricing: $419.00

NOTE: This product has the following shipping restriction(s):
  • This product is not available for shipping to California
Free Ground Shipping Within The Continental US


The SCT X4 is one of the most capable tuners and offers a great value for the Ford 6.4 PowerStroke. This device offers a 2.6" x 5.5" full color LCD screen for simple tuning, monitoring, and datalogging. It's also a fast and easy to navigate user interface, which makes for a great experience with the X4.

This 6.4 PowerStroke tuner comes with 4 preloaded tunes and can store 10 custom tuning files. Tuning your 6.4L diesel is as easy as 1-2-3 with the SCT X4. Plug the programmer into your OBDII port, select a preloaded tune, and you're ready to go in minutes. The simple plug-and-play design makes it easy for anyone to tune their truck at home in just a few minutes.

SCT X4 tuners offer numerous benefits and capabilities outside of the massive power gains. See below for more info on the many benefits, features, and user adjustable options that come with this 6.4L PowerStroke programmer.

6.4 PowerStroke SCT X4 Benefits:

  • Gain up to 160hp & 300 lb-ft of torque
  • Quicker throttle response
  • Includes 4 preloaded tunes
  • Store up to 10 custom tunes
  • At least 8 user adjustable options
  • 2.6" x 5.5" full color LCD screen
  • Wide range of display gauges for monitoring

The SCT X4 offers excellent benefits and features, especially for its $419 price. With the performance tune the 6.4L PowerStroke can see power gains up to 160 horsepower and 300 lb-ft of torque. Other tunes available for the Ford 6.4 diesel include street, towing, and transmission tunes. More information on these preloaded SCT X4 tunes below.

Outside of power gains, the X4 also improves throttle response, firmer shifts, and tons of customization with numerous user adjustable options. A 5.5" screen and variety of display gauges make it easy to tune, monitor, and datalog on the 6.4 PowerStroke.

Preloaded Tunes

SCT X4 programmers include four preloaded tunes for the 6.4L PowerStroke diesel engine:

Performance Tune

The preloaded performance tune is the most aggressive tuning option on the X4. This tune offers the biggest horsepower and torque gains and is good for everyday use, racing, and economy. Towing in any form is not recommended with the performance tune.

SCT X4 Street Tune

Street tunes deliver a great overall balance of economy, performance, and light towing. Power and torque gains are lower when compared to the performance tune, but the street option is safe for towing up to 5,000 lbs. It's also a great choice for everyday driving if you want to keep things on the less aggressive side.

6.4 PowerStroke Towing Tune

SCT X4 towing tunes are mainly focused on towing of any form. The tow tune does increase boost and power, but with much less emphasis on performance. Shift points are optimized for towing with the 6.4L PowerStroke.

Trans Only Tune

Last up is the X4 transmission only tune. This tune leave the engine and boost completely stock and only the transmission shift points are changed. It's a great alternative to the towing tune if you don't want the added power and boost while towing heavier loads.

Ford 6.4 Diesel SCT X4 Adjustable Options:

  • Trans tuning
  • Axle ratio
  • Tire size
  • Speed limiter
  • Traction control
  • WOT shift points by gear
  • Shift firmness control
  • Aftermarket intake

These options are all user adjustable and can be changed, so there are tons of customization options. Change axle ratio, shift firmness, traction control, & more quickly and easily with the SCT X4 device.

Is the SCT X4 the best 6.4 PowerStroke Tuner?

Yes, we believe the X4 is the best tuner available for the Ford 6.4L PowerStroke. It offers a great balance of performance, benefits, features, and price. The SCT Livewire TS+ is also a great choice. It's much the same as the X4 but offers a 4" touchscreen for even easier use and better monitoring & datalogging. We also offer the Livewire TS+ for $599. Ultimately, the SCT X4 offers the better value if you're not looking for a larger screen with touch capability.


Does the 6.4L PowerStroke SCT X4 support custom tunes?
Yes, the programmer supports custom tuning and stores up to 10 files. The device does not include custom tunes (just the 4 preloaded, dyno-tested tunes), so any custom tuning must be purchased and completed separately.

How much power does the X4 add?
The preloaded performance tune can deliver gains up to 160 horsepower and 300 lb-ft. Street tunes can add up to 120hp and 248 lb-ft while the towing tune delivers up to 65hp and 150 lb-ft. However, not everyone will see these exact results. Actual power gains vary depending on many factors like conditions, engine health, other modifications, & more.

Does the 6.4 PowerStroke SCT X4 support emissions deletes?
No, the X4 cannot support modded or deleted 6.4L diesels. SCT products comply with the Clean Air Act, so they do not support any emissions deletes.

Why doesn't this product ship to California?
While the SCT X4 complies with the Clean Air Act it is not CARB compliant on the 6.4 PowerStroke. As such, we do not ship this programmer to California.

Can I use the SCT X4 on multiple trucks?
The X4 tuner is compatible with other trucks, but the device is VIN-locked so it cannot be used on more than 1 vehicle at once. However, the VIN-lock can be removed once the vehicle is flashed back to stock so it can then be used on another truck, sold, or whatever you may decide to do with the device.



Shipping Information

  • Item Requires Shipping
  • 1.1 lbs.
  • W6.0000” x H4.0000” x L6.0000”
  • Free Ground Shipping Within The Continental US

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