This is the Radium Engineering Top Feed Fuel Rail Upgrade. This kit will allow you to upgrade to a larger variety of fuel injector sizes while having a larger internal bore size needed to support all necessary engine power requirements. These rails are CNC machined from solid 6061 aluminum materials and are black anodized and laser-etched for a high-quality surface finish. These rails are designed specifically for OEM or equivalent fitment injectors. For injector height flexibility and thermal insulation, 2 sets of machined insulating spacers are included. All injectors must use 11mm diameter upper O-rings just like the OEM Subaru injectors.
HIGHLIGHTS:
*CNC machined from solid 6061 aluminum construction
*Black anodized and aluminum etched
*8AN ORB threaded ports
*8AN center lower port design
*Allows for a larger variety of aftermarket injectors
*Will fit OEM-like or equivalent injectors
*Includes thermal insulating press-in spacers for injector height flexibility
*Includes stainless steel M8 x 1.25 mounting bolts
NOTE:
*All injectors must use 11mm diameter upper O-rings just like the OEM Subaru injectors
These particular fuel rails will have the 8AN center lower port design