Got is used from a site member, and honestly, I loved it right off the bat. I'm not sure how much detail you guys notice (or don't notice) when driving, but for those who say there's not much of a difference with the 87 octane program...??? My 5.9 shifts WAY better, almost no power lost on torque conversion anymore, nice stiff shifts, and it uses up the entire RPM range when I gas it. Nice low end torque, the power is available immediately, pedal response is improved greately. I didn't raise the RPM, I don't think I will, but my question is; how have you guys found your Hypertech affected the ride? And is there anything I should watch out for like overheating (I don't have an aftermarket thermostat)?

I'll keep you guys posted on the apparent "possible mpg savings" they claim on their website.

 

Nobody's had any experience with this?