SOTF Tune without hardware 2017-2019 Duramax L5P for HP Tuners Apparel Improve the performance on your

Improve the performance on your 2017

EFI Live Auto Cal or Flash Scan

Automatic AutoAgent firmware updates

and enhance performance with the CDAL439 4" down pipe from P1 Race Products

2016 Chevy Silverado or GMC Sierra

SOTF Tune without hardware 2017-2019 Duramax L5P for HP Tuners Apparel Improve the performance on yourTake performance to the next level on your 2017, 2018, or 2019 Chevy Silverado or GMC Sierra with our Switch on the Fly Tuning for the L5P Duramax. Our tunes are purpose built and the switch on the fly (SOTF) option gives you the power to select from five different power levels on the fly using your factory steering wheel controls or the HP Tuners Diesel Switch. Gone are the days of spending 10 minutes changing your tune when you need to tow. The