Especially on Diesels, just added the Hypertech power programmer III, lets you clear and read DTC codes, adjust speedo for tire changes, and add up to three tunes. The highest being plus 90 hp and 163 ft lbs of torque. Baseline was 300 hp and 520 ft lbs, so do the math, almost 400 hp and and almost 700 ft lbs, give or take. This thing runs like a scalded cat now. I loce diesels, unlike a gas engine,y ou just toss fuel ata diesel and they keep making power, but you really got watch the egts', hence why my next addon is an EGT gauge. Some of the higher hp tuner boxes used piggy back have laid down over 500 to the wheels, not sure I wanna get that crazy yet. Oh yeah, still gets 19mpg in town.

 

Nice!

 

The computer on my truck is like that from the factory.
we can set hp tq speed governor redline turn cruise and jakes on and off, all kinds of shit.