Fleece Performance valve spring and retainer kit for Cummins 24V applications upgrades springs and retainers with performance-focused materials. Springs are manufactured from high-clean Hi-Tensile chrome-silicon steel with a multi-step heat treat to reduce load loss, rated at 105 lb seat pressure and 195 lb open pressure at maximum lift. Retainers are thru-hardened 4140 chrome-moly steel with a black oxide finish.
Fleece Performance Cummins 24V Spring And Retainer Set