Parleys Diesel Performance Inc. was founded by and for diesel enthusiasts. During our over 15 years in the industry we have been part of this ever evolving market. If there is anything this industry is about, it’s progression. That’s why we’re here to help you progress in your own diesel experience. Whether you are looking for increased horsepower, increased fuel mileage, alternative fuel or just getting your rig running again Parleys Diesel Performance can help.