Radium Engineering Billet Fuel Rail – VW 2.8L 24V VR6 | 8AN ORB | 20-0878

Radium Engineering 20-0878 CNC billet aluminium fuel rail for the Volkswagen 2.8L 24V VR6. High-flow design with 8AN ORB (O-Ring Boss) ports on both ends, machined to OEM injector spacing for direct bolt-on installation. Includes stainless steel mounting hardware. 2.7 lbs. Ships fast across Canada and the US.

Radium Engineering — Precision Fuel System Components

Radium Engineering produces CNC-machined fuel system components — fuel rails, surge tanks, fuel hat assemblies, and ancillary fittings — engineered for specific engine applications rather than adapted from generic universal parts. Their fuel rails are machined from billet aluminium to tight tolerances, ensuring correct injector fit, mounting alignment, and port geometry for each supported engine. The VR6 rail is engineered to the 2.8L 24V’s injector pattern and mounting boss locations for a direct bolt-on replacement of the OEM fuel rail.

8AN ORB Ports — Fuel Line Connection

Both ends of the 20-0878 feature 8AN ORB (O-Ring Boss) ports:

• 8AN line size: 8AN (1/2" line OD) is the appropriate flow capacity for a modified 2.8L VR6 running upgraded injectors or alternative fuels. Provides adequate flow volume for fuel delivery under high-demand conditions without restrictive pressure drop across the rail.
• ORB port standard: O-Ring Boss ports seal via a soft O-ring compressed against the port face when the AN fitting is tightened — a positive, thread-sealant-free connection that does not rely on tapered thread engagement for sealing. ORB connections are the preferred standard for performance fuel systems due to their reliability and resistance to vibration-induced loosening.
• Both ends ported: Feed and return line connections are available on both ends of the rail — allowing flexible plumbing routing depending on engine bay layout and fuel system configuration (return-style or returnless).

CNC Billet Aluminium Construction

The 20-0878 replaces the OEM VR6 plastic or stamped steel fuel rail with a CNC-machined billet aluminium assembly:

• Fuel compatibility: Aluminium construction is compatible with pump gasoline, E85, and race fuel formulations. OEM plastic rails can degrade with extended E85 or high-ethanol fuel exposure — the billet rail eliminates this concern for builds transitioning to alternative fuels.
• Pressure rating: The billet construction provides a significantly higher pressure rating than OEM plastic rails — relevant for builds using high-pressure fuel systems or upgraded fuel pressure regulators.
• Appearance: The machined aluminium finish is a significant visual upgrade in the VR6 engine bay — relevant for built and show-oriented VR6 builds where underhood presentation matters.
• Injector fit: Machined to accept OEM VR6 injectors and aftermarket injectors with the same clip style and O-ring OD. Confirm injector O-ring diameter when installing upgraded injectors.

VW 2.8L 24V VR6 — Applications

The 2.8L 24V VR6 (engine codes AAA, AFP, AES, and related) was used across multiple VW and Audi platforms. Primary fitments for the 20-0878:

• Volkswagen Golf / GTI VR6 — Mk3 (1993–1998) and Mk4 (1999–2005)
• Volkswagen Corrado VR6 — 1992–1995
• Volkswagen Passat VR6 — B4 and B5 variants with 2.8L 24V
• Volkswagen Jetta VR6 — Mk3 and Mk4

The 20-0878 is also suited to VR6 engine swap builds where the 2.8L 24V is installed in a non-factory chassis — provided the engine’s factory injector rail mounting positions and injector spacing are maintained in the swap. Confirm engine code and injector specifications for swap applications.

Installation — Bolt-On with Included Hardware

The 20-0878 installs in place of the OEM fuel rail using the factory mounting boss locations on the intake manifold. Included stainless steel hardware replaces the OEM mounting fasteners. An 8AN ORB fuel feed line and (if applicable) 8AN ORB return line are required for connection — not included. Install new injector O-rings when re-using existing injectors, and confirm O-ring compatibility when fitting aftermarket injectors.

2.8L 24V VR6 only — confirm engine code. 8AN ORB fittings — AN fuel lines required (sold separately). Compatible with E85 and race fuel. Stainless hardware included. Injector O-ring replacement recommended on install.

Specifications

• Brand: Radium Engineering
• Part Number: 20-0878
• Material: CNC billet aluminium
• Port size: 8AN ORB — both ends
• Hardware: Stainless steel mounting hardware included
• Application: Volkswagen 2.8L 24V VR6 — Golf, GTI, Corrado, Passat, Jetta (Mk3/Mk4 era)
• Fuel compatibility: Gasoline, E85, race fuel
• Weight: 2.7 lbs