S&S Diesel Double-Barrel Fuel Rail for 2007–2018 Ram 2500/3500 6.7L Cummins
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
Description
Description
The S&S Diesel Motorsport® Double-Barrel Fuel Rail is built for max-effort 6.7L Cummins competition applications that demand more rail volume, more stable pressure, and more flexible fuel system configuration. With 2.5x the volume of a stock 6.7L Cummins rail, this bare rail helps reduce pressure drop during high-demand injection events while giving builders multiple options for feed port, sensor, and PRV placement.
Factory common rail fuel systems were never designed for the kind of injected quantity demanded by today’s high-output diesel builds. As fuel quantity increases, rail pressure can drop during the injection event — costing consistency, control, and performance.
The S&S Diesel Motorsport Double-Barrel Fuel Rail solves that problem by increasing available pressurized fuel volume. With 66.1 cc of total volume, this rail offers 154% more capacity than a stock 6.7L Cummins fuel rail, helping maintain pressure more consistently throughout the injection event.
Designed for 6.7L Cummins max-effort competition applications, the Double-Barrel Fuel Rail uses a modular bare-rail layout so builders can configure feed ports, sensors, plugs, and pressure relief valves around their specific setup. It is tested to 3,000 bar / 43,511 psi, made in the USA, and built for serious diesel performance programs.
Key Features
- 2.5x stock rail volume — 66.1 cc total capacity
- 154% more volume than a stock 6.7L Cummins fuel rail
- Helps maintain rail pressure during high-demand injection events
- Allows more injected quantity for the same injection duration
- Improves rail pressure control through more consistent sensor feedback
- Modular port layout for flexible feed, sensor, and PRV placement
- Tested to 3,000 bar / 43,511 psi
- Bare rail design for custom competition fuel system setups
- Made in the USA
Fitment / Application
| Make | Engine | Application |
|---|---|---|
| Ram / Dodge Cummins | 6.7L Cummins | Max-effort competition use |
Technical Specifications
| Spec | Detail |
|---|---|
| Part Number | RAIL-DBL-BRL |
| Fuel Compatibility | Diesel |
| Volume | 66.1 cc / 4.03 cu in |
| Weight | 4.35 kg / 9.6 lbs |
| Maximum Dimensions | 369 mm x 120 mm x 48 mm |
| 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 |
Important Notes
This rail is sold as a bare rail and does not include plugs, fittings, sensors, or pressure relief valves. Additional components should be selected based on the final fuel system layout.
S&S notes that the 2007.5–2018 6.7L Cummins fuel system was designed to operate at 1,800 bar. Even though this rail has been tested to 3,000 bar, they do not recommend running injectors at that pressure because injector return increases rapidly above 1,800 bar, which can prematurely wear injectors and overwork high-pressure fuel pumps.
| Component | Part Number |
|---|---|
| M18x1.5 Rail Cap | CAP-M18 |
| M14x1.5 Rail Cap | CAP-M14 |
| M18x1.5 Rail Plug | CAP-M18x1.5 |
| M18x1.5 to M14x1.5 Feed Fitting | 8000040 |
| 1850 Bar Single Stage PRV | PRV-E-1850-1S |
| 2200 Bar Single Stage PRV | PRV-E-2200-1S |
| 2400 Bar Single Stage PRV | PRV-E-2400-1S |
| 2700 Bar Single Stage PRV | PRV-E-2700-1S |
| 0–2000 Bar Rail Pressure Sensor | RDS-2000 |
| 0–2200 Bar Rail Pressure Sensor | RDS-2200 |
| 0–2400 Bar Rail Pressure Sensor | RDS-2400 |
| 0–2700 Bar Rail Pressure Sensor | RDS-2700 |
| 0–3400 Bar Rail Pressure Sensor | SENS-RDS-3400 |
