Just got my stang back yesterday and it's a completely different beast. I sent the car in to have 4.10's, JLT CAI and a Bama Chips Tuned SCT installed and it's a totally different car. I aleady had a Predator Tuner and was running the canned 91 octane tune and I was satisfied. But now it's a much more more powerful feel. I'm only sorry that they didn't have time to put my steeda ud pullies on. I'm sure that they would offer a little more culmative kick in the arse. Anyone thinking about 4.10s (and mine is an auto) or any of the mods I just had one, I could not recommend it more.