Diesel Performance Harnesses Power Harnesses Made in the USA
  • Over 80,000 Sold
  • Easy to Install
  • 1 Year Warranty

More Power
Up to 90 HP Increase & 250 FT LBS Torque Increase
Noticeable Gains in Torque and Horse Power

The best set of power harnesses on the market. Control fuel rate at your finger tips. Built and tested by a CAT master mechanic. Dyno results from 10 different trucks show increases in horsepower around 90 HP and torque around 250 ft. lbs. Increases in fuel mileage have been from .5 mpg to as high as 2 mpg depending on application. 1 year warranty and all are made in the USA. 100% money back guarantee.

Fuel Effecient Save literally thousands of dollars on fuel by increasing your fuel efficeincy.
Cummins Equipment Logo Save up to
$16,500
Every Year on Fuel
CAT Equipment Logo Save up to
$14,500

Save fuel and let your engine run better! Built and tested by a CAT Master Mechanic. Tested for two years before being sold to the public. Many have imitated but never duplicated the Diesel Freak brand harnesses. Increases in fuel mileage have been from .5 mpg to as high as 2 mpg depending on application. These harnesses were built for one thing, to increase fuel mileage. They can save you thousands of dollars in fuel costs. 1 year warranty and are made in the USA. 100% money back guarantee.

Does NOT void any factory warranties
CAT Adjustable Power Harness

CAT ADJUSTABLE POWER HARNESS

Do you own an electronic CATERPILLAR Engine?
Want to Save Fuel and Run Better Too?


These are the best set of power harnesses on the market. This adjustable set up gives you the ability to control fuel rate at your finger tips. They have been built and tested by a CAT master mechanic.

Dyno results from 10 different trucks show increases in horsepower around 90 hp and torque around 250 ft lbs.

$185.00
Add to Cart
Cummins Adjustable Fuel Pressure Harness

CUMMINS ADJUSTABLE FUEL PRESSURE HARNESS

Own a Cummins ISX Engine?

Adjustable fuel pressure harness for a late 03 to 2010 cummins ISX engine.

Increases in power are adjustable from stock hp to 100 plus gain, Torque gains have been as high as 250 ft lbs.

This set up will increase your fuel mileage anywhere from .5 mpg to 1.75mpg. This harness will wake up your ISX and give that extra fuel mileage that is needed.

$185.00
Add to Cart
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