Description

COMPATIBILITY

H22A1
H22A4
H23A1
F20A
F20B
F22A1
F22A4
F22A6

Fitment onto aftermarket intake manifolds is not tested and cannot be verified. Rails do follow OEM mounting and positioning, so consult the manifold manufacturer to find out if their manifold also follows OEM mounting and positioning.

OVERVIEW

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.

20-0870 Fuel Rail Honda F-H-Series

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 in order to fit the rail. 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 8AN ORB threads to accept 8AN ORB male fittings.

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.

20-0870-PK Fuel Rail Plumbing Honda F-H-Series

The plumbing kit includes the items shown in the image below and allows easy hookup to the factory feed line. It is intended to be used with the factory pressure regulator, but can also work with an aftermarket regulator.