it will be identical to the HKSGT2530 turbo. The turbine wheels are identical between the two turbochargers, but the GT28RS comes with a .86 A/R turbine housing and the HKSGT2530 comes with a .64 A/R turbine housing. Since you have the HKSGT2530 turbine housings already, you will be putting those onto the GT28RS cartridge. All you are doing is swapping the compressor wheel to make the GT28RS into a HKSGT2530.