Radium Engineering Fuel Rail - Honda D-Series 1985-1999

This CNC machined billet rail replaces the factory Honda D-series unit and runs a large internal bore so fuel delivery keeps up with higher injector flow. It is machined from 6061 aluminum, anodized, and laser etched, with four 8AN ORB ports: one at each end plus two auxiliary ports on the top face for a Radium fuel pulse damper, a regulator, or a gauge adapter. The injector bores are 11mm ID, the same as OEM, so factory injectors or any equivalent aftermarket injector seats correctly. Mounting follows the OEM locations, which covers every OEM D-series intake manifold and any aftermarket manifold that retains the stock rail mounting points.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy