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.
Features
-CNC machined 6061 aluminum
-Laser etched logo
-FKM O-rings
20-0516-06 TOYOTA AIR ASSIST INJECTOR SEAT KIT, 6 CYLINDER
20-0516-06 is used to convert Toyota air-assist injectors to standard top feed injectors. 
COMPATIBILITY
2JZ-GE VVT-i
NOTE: There are other engines that are compatible but have never been verified.