2007.5-2018 Cummins Competition Double-Barrel Fuel Rail (RAIL-DBL-BRL)

Fits

The S&S Diesel Motorsport Double-Barrel Fuel Rail is a max-effort competition fuel rail for 6.7L Cummins applications. Factory common-rail injector technology has pushed stock fuel rails well past their intended capacity. As injected quantity increases, rail pressure drops during the injection event. The Double-Barrel offsets this with 2.5x (154% more) volume than a stock 6.7L Cummins rail, keeping pressurized fuel on demand for more consistent rail pressure control.

Sold as a bare rail with no plugs, fittings, sensors, or PRVs. The modular design lets you configure feed port, sensor, and PRV placement to suit your specific build. Not a direct bolt-on.

Part Number: RAIL-DBL-BRL

• 2.5x (154% more) volume than a stock 6.7L Cummins fuel rail
• Maintains pressure better throughout the injection event
• More injected quantity for the same injection duration
• Improved rail pressure control due to more consistent sensor feedback
• Modular design with flexible feed port, sensor, and PRV placement
• Sold as a bare rail (no plugs, fittings, sensors, or PRVs included)
• Made in the USA

• Fuel Compatibility: Diesel
• Weight: 4.35 kg (9.6 lbs)
• Maximum Dimensions: 369 mm x 120 mm x 48 mm
• Volume: 66.1 cc (4.03 cu in)
• Tested Pressure: 3,000 bar (43,511 psi)
• Inlet Ports: 2x M14 x 1.5 Male
• Injector Ports: 6x M18 x 1.5 Male
• Auxiliary Ports: 4x M18 x 1.5 Female

• For max-effort 6.7L Cummins competition applications. Not a direct bolt-on.
• Factory 6.7L Cummins fuel system was designed for 1,800 bar. The rail is tested to 3,000 bar but running injectors at that pressure is not recommended.
• NVH isolators (HPL-ISOLATOR-CU) recommended on injector lines for all competition applications
• Optional fittings, plugs, sensors, and PRVs sold separately

Installation Datasheet