You could probably do the power side of things for 5k or close but then youd still need to do everything else, brakes, suspension, handling, gauges, maintenance etc. to even put the power down and make use of it. Few rough guide prices, bare minimum parts really. Theres a lot more you should buy. Used forged engine - 1.5k Used GT28 kit - 1.2k Injectors - 150 Used EMU - 400 Mapping - 400 Good EBC - 200 FMIC - 200 The list goes on theres a load more parts to buy if youre doing it properly.