It is a very common upgrade from stock. It will make power. Larger turbos than this do little to nothing without high boost or engine upgrades. IMO, I would get a fuel pump, get rid of the granatelli sensor, get a translator with an extender chip or turbo tweak chip, and a scanmaster. Post some pictures of the engine bay as a whole. We might be able to spot some mods, and point you in the right direction.