Roughly to do a turbo setup from a gt or gtp that's pushing 500 hp or more and to do it right you're looking at roughly 3600 for the transmission alone, 3000 for a used intrercooled turbo kit, and at least 2000 in other parts like a tuner,injectors,fuel pump ect ect.


If you're not looking to spend that much then you don't need to go turbo. Start looking at supercharged instead.