PORTS AND FITTINGS

The three large fuel rail ports are tapped for 8AN ORB.

8AN ORB Adapter Fittings can be found HERE.
8AN ORB Direct Mount Regulators can be found HERE.
8AN ORB Fuel Pulse Dampers can be found HERE.
Fuel Pressure Gauge Adapters 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.

This large bore fuel rail features a large 0.69' diameter internal bore.
FUEL INJECTOR COMPATIBILITY
This fuel rail is compatible with factory or OEM equivalent fuel injectors. If upgrading fuel injectors, consult your aftermarket injector supplier for details. Radium Engineering cannot specify any further injector dimensions other than stating ‘OEM equivalent’.

CONFIGURATIONS 

20-0391-02 Fuel Rail, S2000, 06-09 

This basic setup is contains the fuel rail and mounting feet only. It is a great option for custom fuel system applications. Fittings and adapters must be purchased separately.
20-0391-PK Fuel Rail Kit, S2000, 06-09

The plumbing kit includes the items shown in the image below and allows easy hookup to the factory feed line. All fittings are included to complete the installation.