Im telling you my friend has a 2003 ls sport, 2.2 ecotec and it beat my other friends 2000 si anad the cav. had the a/c on.. the 2.4 is bigger than the 2.2 ecotec, plus u can swap heads, and put a sabb intake manifold and turbo cause there the same type of engine im pretty sure...look into it..id do it if i were u..