i run a nx 100 shot, been running it for about 2 years now. in my car with nothing but an o/r x pipe and ebay cai i ran a 13.7 @ 101 on street tires, on the 100 shot i ran a 12.8 @ 110. so it makes a pretty big difference. this was all on the factory stock tune. ran it that way for a while and never had a single problem. im now in the process of working the bugs out of my tune since the cam install and once i get that done i plan to spray it and see what she does now with slicks and 3:73's. im hoping for low 12's or high 11's.