S&S Diesel Motorsports Fuel Injection Pump

S&S Diesel Motorsports Fuel Injection Pumps: Engineering That Moves the Needle

When diesel truck owners and competition builders demand absolute confidence from their high-pressure fuel system, S&S Diesel Motorsports is one of the names they trust most. Based in Seymour, Indiana, S&S has built its reputation squarely on the precision and performance of its fuel injection pumps — components that sit at the very heart of every common-rail diesel fuel system.

Why Fuel Injection Pumps Matter in Common-Rail Diesels

The high-pressure fuel injection pump is responsible for generating and sustaining the rail pressure that modern common-rail diesels depend on — often exceeding 30,000 PSI in performance applications. A weak or failing pump means inconsistent fueling, power loss, and in the case of the problematic factory CP4, potentially catastrophic metal contamination of the entire fuel system. That is exactly the problem space S&S Diesel Motorsports has made it their mission to solve.

S&S Fuel Injection Pump Product Lines

S&S Diesel Motorsports offers several distinct injection pump solutions designed to address both reliability and performance goals across the three major diesel platforms:

• CP3 Performance Pumps — The proven CP3 architecture is a cornerstone of the S&S lineup. Their CP3 pumps, including platform-specific variants like the Duramax SuperSport (LBZ-based) and 10mm-piston options, are engineered to handle increased fuel demand while maintaining pressure stability — making them a favorite for high-horsepower competition builds where consistent fueling is critical.
• Reverse Rotation CP3 Pumps — For dual-pump applications where a secondary pump must spin in the opposite direction, S&S offers reverse-rotation CP3 high-pressure fuel pumps, expanding the possibilities for extreme-output build configurations.
• CP4-to-DCR Conversion Kits — Perhaps the most celebrated product in the S&S pump lineup, the DCR conversion replaces the factory Bosch CP4 high-pressure pump — notorious for failure and downstream fuel system damage — with a more durable Stanadyne DCR two-piston pump. Designed as a direct drop-in replacement for Ford 6.7L Powerstroke owners, this kit is engineered to match the factory CP4 output curve without requiring calibration changes, offering true plug-and-play reliability.
• CP4-to-CP3 Conversion Kits — For Duramax and Cummins platforms, S&S also provides CP4-to-CP3 conversion kits, swapping out the vulnerable factory high-pressure pump for the time-tested CP3 design with a proven track record across millions of miles.

What Sets S&S Diesel Motorsports Pump Engineering Apart

S&S Diesel Motorsports management brings a combined 63 years of diesel fuel injection and engine development experience, including backgrounds at Bosch and Cummins. Every injection pump produced by S&S features precise internal adjustments to optimize performance and reliability. Rather than relying on off-the-shelf testing equipment, S&S uses custom-built in-house test stands — among the most advanced in the aftermarket — to thoroughly validate each unit before it leaves the facility. The result is a fuel injection pump built to the same stringent standards as their legendary injectors, tested rigorously for both performance output and long-term reliability.

Whether the goal is protecting a daily-driven truck from a factory pump failure, building a capable tow rig, or assembling a full competition fuel system, S&S Diesel Motorsports fuel injection pumps are engineered to deliver where it counts most.