2024 Duramax Tuning Auto. Choose your preferred power level and enjoy your ride all while controlling temperatures. Ppei's l5p duramax tuning offers the best performance, efficiency, and reliability.

This is your warranty friendly alternative to a flash tuner. We also learn about the l5p duramax engine utilizing improved engine braking through a more potent turbo vane actuator, upgraded valve springs, and the integration of the.