CXRacing Aluminum Inlet Flange/Adapter 2 Bolt 2.25 Inch for GT25R GT28 Turbo CNC Billet Aluminum Inlet Flange/Adapter for GT25R, GT28, GT28R turbo (like the ones on SR20DET Engine). Bolt On to Compressor housing inlet. Inlet Adapter is 2 Bolt, 2.25" O.D