Radium Engineering CNC Fuel Rail Set – GM Vortec 8100 L18 8.1L Big Block | 8AN ORB

Upgrade the fuel delivery system on your GM Vortec 8100 (L18) 8.1L big block build with the Radium Engineering CNC Fuel Rail Set. Engineered specifically for the L18 big block, this fuel rail set replaces the factory fuel rails with a full CNC-machined billet aluminum construction featuring stainless steel mounting brackets and 8AN ORB ports at every connection point — providing the fuel flow capacity and plumbing flexibility needed for high-output L18 builds running upgraded injectors and high-flow fuel systems.

Key Features

• Full CNC Billet Aluminum Construction: CNC-machined from billet aluminum for precision fitment, superior strength, and corrosion resistance — a significant upgrade over the factory plastic or cast fuel rails
• 10 Total 8AN ORB Ports: 8AN ORB (O-Ring Boss) ports at each end of both fuel rails plus at each injector location — 10 total 8AN ORB ports for maximum plumbing flexibility in return-style and returnless fuel system configurations
• 8AN ORB End Ports: 8AN ORB ports at each end of both rails allow feed and return line connection at either end — simplifying fuel line routing in a variety of engine bay configurations
• Stainless Steel Mounting Brackets: Stainless steel mounting brackets for corrosion resistance and long-term durability in demanding engine bay environments
• L18 Big Block Specific: Engineered specifically for the GM Vortec 8100 (L18) 8.1L big block V8 — direct fitment for the L18 injector and mounting configuration
• Radium Engineering Quality: Manufactured by Radium Engineering — a trusted name in precision CNC fuel system components for performance and motorsport applications

Specifications

• Type: Fuel Rail Set (Pair)
• Construction: Full CNC Billet Aluminum
• Mounting Brackets: Stainless Steel
• Port Size: 8AN ORB (O-Ring Boss)
• Total AN Ports: 10 (end ports + injector location ports)
• Engine: GM Vortec 8100 L18 8.1L Big Block V8
• Part Number: 20-0862

Note: Verify injector fitment and port configuration compatibility with your specific L18 build before ordering. Fuel line fittings and injectors sold separately. Professional installation by an experienced fuel system specialist is recommended. Ensure all fuel system connections are leak-tested before starting the engine.