Radium Engineering 20-0870 Fuel Rail for Honda F/H-Series Engines

Vehicle Fitment

• Honda H22A1, H22A4, H23A1 I4 (various years/models)
• Honda F20A, F20B, F22A1, F22A4, F22A6 I4 (various years/models)

Features

• CNC-machined from 6061 aluminium for strength and reliability
• Anodised finish with laser-etched branding for engine-bay aesthetic appeal
• Large internal bore design supports high-flow fuel delivery for performance builds
• Injector bores sized at 11 mm ID for direct use of factory or equivalent aftermarket injectors
• Ports tapped for 8 AN ORB female fittings to allow modern fuel system plumbing
• Compatible with gasoline and alcohol-based fuels (e.g., E85) for tuned applications
• Designed for bolt-on installation on Honda F-series and H-series intake manifolds with OEM spacers
• Ideal for street, track or tuned engine applications requiring upgraded fuel delivery

Specifications

• Material: 6061 aluminium
• Finish: Black anodised
• Injector bore inner diameter: 11 mm ID
• Ports: 2 x 8 AN ORB female
• Installation type: Bolt-on fuel rail, includes mounting hardware (hoses/fittings not included)

Included Components

• 1x Radium Engineering 20-0870 fuel rail assembly
• Mounting hardware (bolts and spacers) for intake manifold mounting
• No fuel hoses, fittings or regulator included - installer must supply

Product Description

The Radium Engineering 20-0870 fuel rail is a high-quality upgrade designed for Honda F-series and H-series engines (F20/A/B, F22, H22/A4, H23A). With its billet aluminium construction, 11 mm injector bores, and 8 AN ORB ports, it offers the capacity and flexibility required for performance builds and fuel delivery upgrades. Whether you're running factory injectors or upgraded units, the rail's design ensures reliable flow and pressure stability.

Installation is straightforward: the rail uses OEM mounting bolt locations and spacers, making it suitable for bolt-on performance applications. Because this product focuses on fuel delivery rather than emissions or driveline fitment, it aligns well with tuned engines, high-RPM use, or forced-induction setups. Note that hoses, fittings and regulators are not included and must be selected separately to complete your fuel system upgrade.