You will need an exhaust mannifold that will mate the turbo to the head, a downpipe, oil and coolant piping for the turbo, an intercooler with piping, a blow off valve and some sort of fuel management to increase fueling under boost. The best thing to do is find out as much information about turbocharging a Cavalier from other owners as possible and then do it yourself. You will learn a lot, save yourself a lot of money and you will be able to fix problems when they come up (which is bound to happen with a turbocharged car). Hope that helps.