Description
PORTS AND FITTINGS
The fuel rail ports are tapped for 6AN ORB and 8AN ORB.
6AN ORB Adapter Fittings can be found HERE.
8AN ORB Adapter Fittings can be found HERE.
8AN ORB Fuel Pulse Dampers can be found HERE.
Fuel Pressure Gauge Adapters can be found HERE.
Direct Mount Regulators can be found HERE.
Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide.
COMPATIBILITY
2021+ Toyota GR Yaris
2023+ Toyota GR Corolla
OVERVIEW
Manufactured with 0.6" large internal bores, the Radium Engineering fuel rails can support all necessary engine power requirements. The 2 end ports are 3/4"-16 threaded (8AN ORB). The upper area of the engine is very narrow so the 2 top ports are 9/16"-18 threaded (6AN ORB).
Stainless steel mounting tabs (shown) are included for superior strength.
FUEL INJECTORS
The OEM fuel injectors are compatible with these fuel rails. The machined ports are compatible with 11mm upper injector O-rings, as shown below.
Because of the tight clearance, the injector electrical connector can be tricky for aftermarket injectors.
FEATURES
-Anodized surface finish for wear and corrosion resistance
-Lighweight aluminum construction
-Inner bore diameter: 0.6 inch
-Compatible with aftermarket Bosch EV14 fuel injectors
-Can be converted to a pressure regulated return system
-No special tools required for installation
-Fits under the factory engine cover
20-0766 FUEL RAIL
As shown below, 20-0766 only includes the fuel rail and all of the necessary mounting hardware. This is ideal for those wanting to make a custom fuel system.
See below for a plug and play plumbing kit that reuses all of the OEM parts.
20-0766-PK PLUMBING KIT
When used in conjunction witht he 20-0766 fuel rail, the 20-0766-PK add-on plumbing kit permits a plug and play connection to the factory G16E-GTS fuel system.
As shown below, a 6AN ORB fitting plugs the upper RH port and a 8AN ORB fitting plugs the RH side port. 
A 8AN ORB clamp assembly adapts the OEM fuel pressure sensor to the RH side port.
As shown above, the upper LH port features adapters to position the SAE quick conect fuel feed fitting in the proper location.
