PPEI Custom Tuning

2013-2018 Cummins 6.7L PPEI EFILive AutoCal AISIN Transmission Tuning For vehicle owners seeking unmatched performance and precision in transmissio...

2001-2004 Duramax LB7 PPEI EFILive AutoCal Custom Tuning Choose PPEI's Engine Calibration for your 2001 - 2004 LB7 Duramax and transform your truck...

2017-2023 Duramax L5P PPEI RTD/HP Tuners MPVI Transmission Tuning Extend your L5P Duramax's transmission's life and increase your fuel economy wit...