The GT30R is a customizable Garrett ball bearing GT turbo that is packaged without the turbine housing. (It includes a CHRA and compressor housing.) Turbine housing kit options offer either a 4 Bolt Turbine outlet or a 90mm V-Band outlet.
Specs:
Compressor:
Inducer 57.0mm
Exducer 76.2mm
Trim 56
A/R 0.60