Valve Spring & Retainer Kit Mopar Gen III Hemi

The COMP CAMS Valve Spring & Retainer Kit for Mopar Gen III Hemi (Part No. 7228CC-KIT) is a complete valve train upgrade designed for high-performance and race engine builds. This kit delivers the precision components necessary to maximize valve control and engine reliability in demanding applications, from street performance to full competition use.

The kit features a conical single spring design with a 440 lb/in spring rate, engineered to handle aggressive valve events while maintaining stable seat pressure across the RPM range. The 1.125-inch coil bind specification prevents over-compression of the spring during extreme valve travel. Each retainer is constructed from chromoly steel for superior strength-to-weight performance, while hardened steel valve locks and PTFE seals ensure durability and consistent operation. The included seats are precision-finished to work seamlessly with Gen III Hemi cylinder head architecture. These components work together to minimize valve float, reduce harmonics, and extend the service life of valvetrain components in high-lift, high-RPM environments.

This kit is purpose-built for Hemi engine enthusiasts and performance technicians who demand precision fitment and proven reliability. Whether you're building a street performance Hemi, preparing an off-road power unit, or assembling a dedicated competition engine, this kit provides the valve control and consistency required for sustained high-performance operation. COMP CAMS' reputation for precision manufacturing means every component meets strict tolerances, reducing guesswork during assembly and ensuring consistent results across multiple builds.

Valve spring and retainer kits are critical components in any engine upgrade. The combination of spring rate, seat pressure, and component quality directly affects power delivery, reliability, and longevity. COMP CAMS' engineering ensures this kit complements both stock and enhanced Hemi cylinder heads, making it a trusted choice for Mopar enthusiasts building world-class powerplants.