I second all that is said about griggs!! I have a full setup on my car and I can go around just about any car on the racetrack. I love it. I haven't taken my car out in about half a year because of where I'm located right now. But it's true suspension really does make a huge difference on the racetrack. Horsepower and such is great but like what mark says in his article about the griggs is true to every sentence!! I recommend griggs all day long for anyone who is serious out roadracing or getting there car to stick in general.