I got the opportunity to drive a friends stock SRT6 yesterday, he was having some problems and he wanted me to drive the car. So we went for a little ride, I didn't run it hard, but hard enough to get the feel of what it had. He had been wanting to go for a ride in my car with the Renntech kit to see how much difference there was. I got mine out of the toy box, tried to get him to drive, but he said he would rather just ride. I think I scared the crap out of him, he said that it was probably the fastest car he had ever rode in. After driving his and then getting in mine, I would compare it to getting out of a regular Xfire and getting in a SRT6 for the first time. I really couldn't believe the difference, I installed the kit at 800 mile's and had not driven the car hard before it had around 1,000 mile's on it.