HONDA J37 Throttle Body. This throttle body is an excellent upgrade over the FN2 OEM throttle body. It features a 12mm bigger (over OEM) bore. It comes complete with the P2R Adaptor plate and fixings and a genuine Honda Gasket. You will need to port match the RSP and RRC inlet manifold to 70mm otherwise a bottle neck will occur. The ultimate DBW genuine Honda OEM throttle body.