I got a 2003 cavalier ecotec turbo and right not i running gmpp reflash witch works but really rich i got cobalt ss/sc injectors 2.5 tmap saab td04 turbo 2.5 dp to 3 inch full exhaust ssqv bov set at 8-10 psi i was wanting to buy hp tunners and a wideband but everything i read about cavaliers say its really hard to tune so i was wanting if i be wasting my money in live in central WV really dont have any dynos around or any tunes im aware of