ok, Im thinning out what I really NEED for my car to be fast, thanks to RB83L69, he stated I should seek my cars weakest points and concetrate on them, well exhaust si first, headers adn y-pipe are already in the mail from JEGS and when I get 260$ Im getting a hooker cat-back and I have no idea what Im going to do with my cat, gut it or get a high flow cat, not sure yet. But Im also about to buy 3.73 gears. Now the other most restrictive parts of the LG4 are teh heads and the camshaft right? Im still having a lot of trouble with choosing a cam, I guess either a XE256HR or XE262HR, with crane 1.5 roller rockers I guess. Now heads are the other most restrictive part right? What is the stock measurements on my heads, anyone know? Should I port them or see if I can find certain heads on ebay? Help!!!! Thanks.