Pretty spot on with this. 100hp tune that wakes the truck up and maybe helps a little off the line. Would be great if they could reduce some of the turbo lag, too. Let's face it....at the end of the day these are still trucks. And I use mine as such. I won't go any farther than a tuner myself, simply because I don't need it. AND......I have another "toy" on order that will scratch my go-fast itch a LOT better than the RHO. With any luck I'll have it by December. Currently waiting for an allocation and then a roughly 10-12 week build time. Includes the digits S58.....