[PeteK]

Good looking truck. How many miles on it? I ask because the drivetrain warranty is 100,000 miles, and if you modify the software in the ECU, you will void the warranty. My 2021 is still under the 36/36,000 full warranty, so I have not done any engine mods yet. Others here have experience with tuners and what to get and how to use them.

 

[PeteK]

beaker, thanks for those videos. I wouldn't try to stack another 100HP on the stock engine either, but there are other good reasons to consider the aftermarket tunes. First, delete the DPF and regeneration cycles. That will reduce heat load on the engine and improve fuel mileage. Second, delete the DEF and cat. You would have to do that to delete the DPF, and vice versa. Third, delete the EGR.

These things should improve engine longevity.