All very good info for him... But, I think the easiest are the mechanical parts... Now this big problem... The electronics to let your engine run with the upgraded / altered parts...

That's the BIG problem... For the original poster, keep in mind that this car operates on a tangled mesh of computer modules that all have to enjoy each others company... If computer module "A" is having a bad day, the entire car runs the risk of not running properly, or at all...

After doing MEGA research on this process I would not risk it without the professional help of someone who knows exactly how to reprogram the entire computer system... And has proven experience installing a turbo / SC on this engine...