24V Valve Springs and Retainer Kit

The XDP 24V Performance Valve Springs and Retainer Kit XD313 is engineered to provide superior valvetrain control for your 1998.5-2018 Dodge 5.9L and 6.7L Cummins engine. Factory valve springs are often inadequate for modified applications, struggling to manage increased engine RPM and elevated boost levels, which can lead to detrimental valve float and potential engine damage. Furthermore, high boost and drive pressures can force valves open, causing reversion—a phenomenon where exhaust gases enter the cylinder during the intake stroke, significantly degrading engine performance. This kit features a unique conical spring design that offers enhanced valve control compared to traditional straight springs. The conical shape allows for a smaller, lighter, yet stronger retainer, improving overall efficiency. Engineered for versatility, the XD313 kit is suitable for a wide spectrum of applications, ranging from stock configurations to extreme competition builds capable of producing up to 2,000 horsepower. This makes it an ideal one-and-done upgrade solution, allowing for substantial future engine modifications. Each spring in the XD313 kit undergoes rigorous testing, including computer load mapping to ensure precise matching within 1 lb of seat pressure. A subsequent stress relief process guarantees both quality and long-term reliability. The kit is sold complete, including springs, locks, and retainers. It is backed by XDP's 1-year unlimited mileage warranty, reflecting the manufacturer's confidence in its durability and performance.