Depending on how much you can do yourself. I spent about 1100 on my setup and I built EVERYTHING except the manifold and HKS exhaust. I did the DP, custum made my own flanges, custom made intake,hot,and cold piping. I am actually considering making a template out of my cold pipe at least and selling them since it is the ONLY cold pipe i've seen that retains the stock battery location and all components. The pipe slips right between the radiator shroud and whatev the silver canister is below the battery and comes out nicely underneath level with the intercooler making a nice long mandrel bent u-turn into the intercooler.

Anyways, if you don't have access to the equipment to make your own parts you might want to consider a full kit either from a manufacturer like GReddy or from someone parting their setup like this guy above me.