if i end up keeping my car(most likley), im thinking of having my 15g just rebuilt. but at the same time, can i upgrade this turbo as well? i know you will ask, "why not just change turbos altogether?" reason is that i dont really want to change my setup...i mean i would love to, but right now, i cant afford a new mani, turbo, dp setup. im not looking to make a grip of power...just like 250ish.