The Racer X Fabrication throttle body inlet for the 1991-1995 Toyota MR2 is a direct replacement for the OEM throttle body inlet. The OEM throttle body inlet is smaller than the throttle body opening which creates a small restriction before entering the throttle body. The Racer X throttle body inlet matches the OEM throttle body opening for the Gen 2 and Gen 3 which reduces the airflow restriction through the throttle body. The flange is CNC machined from 6061-T6 aluminum and welded to your choice of either 2.5” or 3” tubing that is bead rolled to prevent couplers from slipping off under boost.