The Radium Engineering 20-0866 Fuel Rail Kit is a billet aluminium fuel rail solution for the Audi R8 Type 4S and Lamborghini Huracan 724 V10. CNC machined from 6061 aluminium with very large 0.69" internal bores, these rails support all engine power requirements without flow restriction — from naturally aspirated builds through to high-power forced induction applications.

Each rail features six 8AN ORB ports (12 total across both rails), providing ample connection points for fuel pressure regulators, pulse dampers, and custom plumbing. The injector bores are 14mm ID — matching OEM dimensions — so factory injectors or any OEM-equivalent aftermarket injector can be used. Factory injector retaining clips are also reusable. The rails are compatible with all fuel types including E85 and popular alcohol mixtures.

This kit includes the fuel rails and mounting hardware only — ideal for custom fuel system builds. For a complete plug-and-play hookup, pair with the Radium 20-0866-PK Fuel Rail Plumbing Kit.

Key Features

• Very large 0.69" internal bore — supports all engine power requirements without flow restriction
• Six 8AN ORB ports per rail — 12 total, providing maximum flexibility for custom plumbing
• 14mm ID injector bores — OEM equivalent, compatible with factory and aftermarket injectors
• OEM retaining clips reusable — no need to source new injector clips
• CNC machined 6061 aluminium — lightweight, strong, and precision fit
• Anodised and laser etched — high quality surface finish with permanent part identification
• E85 and alcohol fuel safe — compatible with all fuel types including methanol, ethanol, and E85
• Custom application ready — right rear ports ideal for FPR and fuel pulse damper mounting

Kit Includes

• 2x billet aluminium fuel rails (LH and RH)
• Mounting hardware

Note: Fittings, hose, and additional fuel plumbing items not included. See Radium 20-0866-PK Plumbing Kit for a complete OEM plug-and-play hookup solution.

Vehicle Fitment

• 2016+ Audi R8 Type 4S (V10)
• 2014+ Lamborghini Huracan 724 (V10)

Available Part Numbers

• 20-0866 — Fuel Rail Kit, Audi R8 Type 4S / Lamborghini Huracan 724 V10 (rails and hardware only)
• 20-0866-PK — Fuel Rail Plumbing Kit (fittings, hoses, crossover — sold separately)

Why Radium Engineering?

• ✔ Designed and manufactured in the USA
• ✔ CNC machined 6061 billet aluminium — precision fit, fuel safe
• ✔ E85 and alcohol fuel safe throughout
• ✔ Trusted by professional motorsport teams and serious enthusiasts worldwide
• ✔ Exclusively distributed in Australia by Coore

Genuine Radium Engineering product. Stocked in Sydney for fast Australian delivery. Fittings and hose sold separately. Pair with 20-0866-PK Plumbing Kit for a complete installation. Professional installation recommended.