2011-2016 6.6L Duramax LML

Can you really get more from your diesel just by adding a performance tuner? Believe it! Make more power and torque and save money on fuel.

Help your diesel breathe clean, filtered air and keep operating temperatures cooler with an intake kit, intake manifold elbow, or intercooler upgrade.

We offer complete diesel exhaust systems and components like mufflers, resonators and tips in a wide variety of materials from the best manufacturers in the business.

We carry a full line of fuel injection pumps, lift pumps, injectors and injector nozzles. Now you can adjust your fueling to make the power you want for your specific application.

Choose from a huge selection of Dual and Single Stack kits, as well as individual stack tips and stack components like rain caps and heat shields.

Monitor boost PSI, transmission temperature, engine temperature, or any other parameter with gauges, gauge monitors, and gauge pods and monitor mounts.

Choose from Fully Built Transmissions, Clutches, Torque Converters, Transmission Pans and Differential Covers from the best manufacturers in the industry.

Shop Parley’s Diesel Performance for stock replacement turbos and performance single and twin turbos for Powerstroke, Cummins, and Duramax diesels.

Cool operating temperatures, reduce emissions, make more horsepower and get better fuel mileage with a water methanol injection kit for your diesel.

Upgrade your diesel engine for more power, reliability, and longevity with aftermarket diesel parts like head studs, cam shafts and head gaskets.

Customize your truck your way with diesel accessories like hitches, lights, floor mats, bed covers, running boards, lifts and bumpers at Parley’s Diesel Performance.