garrett make turbochargers for HKS and HKS have a special exclusive offer contract from garrett
this means HKS can make up a spec with whatever they like and get garrett to build and garrett are not allowed to sell it
so you can't buy a GT-RS exactly the same from garrett, as HKS have exclusive rights on the wheels, trims, specs, etc
you can get very close, but not the exact same turbocharger from garrett or a garrett reseller
so you cant buy a garrett GT-RS or 2530 or 2540 or 3037s