Injector Seat 20mm Radium Engineering for Toyota Celica MR-2 3 S-GTE 2nd 3rd Gen - USA-RAD-20-0848 - These are the same machined aluminum injector seats used in many Radium Engineering fuel rails. They are required when converting the OEM fuel injector to aftermarket fuel injectors. They simply press-fit into the intake manifold injector ports with no modifications required. Using the included FKM O-ring, they seal into the machined injector counterbore preventing vacuum (or boost) leaks. The injector seat bores are designed to be used with a common 14mm lower injector O-ring. NOTE: Because they are compatible with different cylinder engines, the injector seats are sold individually (not a set). Change quantity accordingly. Features CNC machined 6061 aluminum Laser etched logo FKM O-rings 20-0848 TOYOTA INJECTOR SEAT, 20MM 20-0848 is used to convert side feed injectors to top feed injectors. These injector seats are anodized black COMPATIBILITY 1990-1999 TOYOTA Celica 3S-GTE (2nd/3rd GEN) 1990-1999 TOYOTA MR-2 3S-GTE (2nd/3rd GEN) NOTE: There are other engines that are compatible but have never been verified.