I have a confession....I have been beaten many times by my buddies stock cavelier MTX...it wasn't even a Z24. His brother has one of the new ones(you know with the body kit and stuff).They have the same exact engine and are both MTX and there is such a huge difference between them when they race its not funny. The guy with the older(00' i think)cavelier beats the 2002 so bad.Its like really sad. They beat me off the line really bad and i can never gain any ground... To me i think this whole issue has been beaten to death.MTX will beat an ATX...no question about it...even with intake and exhaust.I just can't see it happening with my past experience with them. They are light and though they still don't have much HP they are quick little bastids. My car is stock and can't hang with a regular 115hp cavelier mtx nevermind a Z24.