If you had a more popular car, it'd be cheaper. It costs for R&D etc. Not sure on the exact costs. If you had say a 240sx with the KA24DE you could go to http://www.boostdesigns.com/stage1.htm and get a t3, tubular manifold, downpipe, 38mm wg, FMIC w/pipes, FMU, BOV, oil feed, return, fittings...