Radium 20-0862 Fuel Rail Upgrade for GM Vortec 8100 L18 Big Block, Pair 01-10

Vehicle Fitment

• 2001-2002 Chevrolet/GMC C3500HD
• 2001-2006 Chevrolet Suburban XL 2500 / GMC Yukon XL 2500
• 2001-2007 Chevrolet Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD
• 2001-2010 Chevrolet Kodiak / GMC Topkick (medium-duty)
• 2002-2006 Chevrolet Avalanche 2500
• Workhorse Class A W20/W22/W24/W25 Motorhomes
• Also used in Malibu Wakesetter and Mastercraft inboard boats, and the T-98 Kombat armored vehicle - all equipped with the GM Vortec 8100 (8.1L) big block

Fitment Notes

• This is an upgrade rail, designed to reuse OEM (or OEM-equivalent) fuel injectors - not a top-feed conversion rail
• Radium does not make injector recommendations; consult your tuner or the injector manufacturer for correct fitment if upgrading injectors
• Plumbing kit sold separately by model year: 20-1062 for 2001-03 return-style fuel systems, 20-1162 for 2004-10 returnless-style fuel systems

Features

• CNC-machined from 6061 aluminum
• Black anodized, laser-etched finish for a high-quality surface
• 6 ports per rail (12 total), 3/4"-16 tapped for 8AN ORB fittings
• Reuses OEM or OEM-equivalent fuel injectors - no injector modification required
• Ample port spacing to accommodate regulators, gauges, and pulse dampers
• Made in the USA (Clackamas, Oregon)

Specifications

• Material: 6061 aluminum (CNC-machined)
• Finish: Black anodized, laser-etched
• Ports: 6 per rail (12 total), 8AN ORB, 3/4"-16 thread
• Quantity: Pair (2 rails)
• Rail Type: Upgrade (reuses OEM injectors)

Included Components

• 2x Anodized Billet Aluminum Fuel Rails
• 4x Stainless Steel Mounting Feet
• Stainless Steel Mounting Hardware

Product Description

The Radium 20-0862 is a CNC-machined, black-anodized fuel rail upgrade for the GM Vortec 8100 (8.1L) big block, covering an unusually wide range of platforms - from 2500/3500HD trucks and Suburban/Yukon XL 2500s to medium-duty Kodiak/Topkick chassis, Workhorse motorhomes, and even inboard ski boats and specialty vehicles that share the same engine. As an upgrade rail, it's designed to reuse your OEM or OEM-equivalent injectors rather than force a top-feed conversion.

Twelve total 8AN ORB ports across the pair give plenty of room to run a fuel pressure gauge, regulator, and pulse damper without fighting for space, and the rails ship with stainless mounting feet and hardware so the rail itself is ready to install - you'll just need the matching plumbing kit (sold separately) for your specific model year's fuel system.