20-0869-02 FUEL RAILS, TOP FEED UPGRADE, SUBARU EJ22/EJ251 VEHICLE COMPATIBILITY *1999 Subaru Impreza 2.2L (CARB) 99-01 Subaru Impreza 2.2L (FED) 99-04 Subaru Impreza 2.5RS 99-04 Subaru Impreza 2.5TS 99-04 Subaru Impreza 2.5OBS 99-04 Subaru Forester *1999 Subaru Legacy 2.2L (CARB) 1999 Subaru Legacy 2.2L (FED) 00-04 Subaru Legacy 2.5L 00-04 Subaru Outback 03-05 Subaru Baja *Not compatible with OEM top feed injectors. The following is also required: 20-0816 (x 4), 14-0720 (x 4), Flat Head M8x 1.25x 60mm Screws (x 4) FUEL INJECTOR COMPATIBILITY This fuel rail is compatible with the OEM air assist fuel injectors found on the EJ251. However, it is not compatible with the OEM air assist fuel injectors found on the EJ22 as they use 11mm upper injector O-rings. The machined injector ports are designed for 14mm upper injector O-rings. The fuel rails are compatible with 48mm tall Bosch EV14 injectors. Compatible aftermarket injectors must have 14mm upper and lower O-rings. Injector Dynamics 1050.48.14.14Injector Dynamics 1300.48.14.14Injector Dynamics 1700.48.14.14Injector Dynamics 2600.48.14.14To eliminate the Subaru air assist feature on the EJ251, the provided O-rings should be installed into the lower groove on the Bosch EV14 injectors.  To eliminate the Subaru air assist feature on the EJ22 (california spec only), 20-0816 (x 4) injector seats are required as well as 14-0720 (x 4) spacers, and flat head M8x 1.25x 60mm Screws (x 4).   OVERVIEW Thermal insulating spacers are provided to protect from heat transfer. Each fuel rail has three 8AN ORB threaded ports (6 total). If the OEM fuel pressure regulator needs to be reused, 20-0303 can be used. Alternatively, Radium Engineering 20-0978 plumbing kit could be installed INCLUDED Black Anodized Laser Etched Aluminum Fuel Rails (x 2) Green Anodized Fuel Rail Mount (x 2) Black Anodized and Laser Etched 26mm Injector Seats (x 4) Thermal Insulating Press-In Spacers (x 4) Rubber Mounting Spacer Stays (x 4) FKM O-rings For Aftermarket Injectors (x 4) Stainless Steel Fuel Rail Hardware (x 4) Stainless Steel Mount Hardware (x 4) Instruction PDF