dear god now i see how badly i needed this programmer cause my truck flat out flies now. when i first tuned it it was registering 28" tires yet i have 31's on it so my speedo was off. also befor i was noticeing that my brakes were not getting enough extra boost and now that i have the superchips it seems to have more boost at the master cylinder and now i dont have a spongy pedal. any way now i think im ready to give a hemi a good run now. i wish i had done this sooner.