Save fuel and run better too. What you are buying are the best power harnesses on the market. They have been built and tested by a CAT master mechanic. They were developed and tested for two years before being sold to the public. Many have imitated but never duplicated the Diesel Freak brand of caterpillar power harnesses. Dyno results from 10 different trucks show increases in horsepower around 70 hp and torque around 200 ft lbs. 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, that was to increase fuel mileage. They can save you thousands of dollars in fuel costs. The harnesses are professionally built and tested before shipping. They carry a lifetime warranty and are made in the USA. If for any reason you do not like the results I offer a 100% money back guaranty. Simply return the product within 60 days for a full refund.
These harnesses will not work on the 3126 or the bridge, engine serial number prefix MBN, or MBL. We do not have a harness that works on the SDP or the LEE serial.
There are two types available, big power gain or fuel saver. You gain power with either one just let me know which you prefer.
When placing an order I must have your engine serial to make sure you get exactly what your engine needs.
Also anybody into truck pulling can have a custom set built with fuel pump trick kit depending on gain needed. email me for more info.