For a good comparison see the thread here. Specifically my post (post#7 in the thread) lists lap times comparing the different Camaro models (and some other vehicle brands) and I also have a link to the article that explains what the Ultimate Track Camaro SS is so you'll understand what that car is and also see that it's still a few seconds slower than the Z/28. So while this suspension will make a big difference for you...it will not automatically put you neck and neck with a Z/28.
(See post#7 here)
http://www.camaro5.com/forums/showth...89#post8126989