Manufactured with a large internal bore, the fuel rail can support all necessary engine power requirements. They are CNC machined from 6061 aluminum, anodized, and laser etched for a high quality surface finish. Like the OEM fuel rails, the injector bores are 11mm ID so factory injectors, or any equivalent aftermarket injector, can be used.
FUEL INJECTOR COMPATIBILITY
This fuel rail is compatible with factory or OEM equivalent fuel injectors. If upgrading fuel injectors, they must maintain the OEM height and O-ring dimensions for proper fitment. Consult your aftermarket injector supplier for details. Radium Engineering cannot specify any further injector dimensions other than stating "OEM equivalent".
PORTS AND FITTINGS
This fuel rail has 4 ports that are tapped with 7/8”-14 threads to accept 8AN ORB male fittings.
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.
COMPATIBILITY
- Honda D15B
- Honda D15Z
- Honda D16A
- Honda D16B
- Honda D16Y
- Honda D16Z
- Honda SOHC ZC
- Honda DOHC ZC
Fitment with aftermarket intake manifolds is not tested and cannot be verified. These fuel rails follow OEM mounting and positioning.
Installation instructions