I ran Superchips Cortex 93 tune on mine for several months before getting Uprev with my Stillen LT's.
Yes you need to return everything to stock. I'm sure they can change throttle sensitivity with the uprev software. Part of the tuning they do is changing the fuel and timing so yes they can change the timing.
Yes you need to return everything to stock. I'm sure they can change throttle sensitivity with the uprev software. Part of the tuning they do is changing the fuel and timing so yes they can change the timing.