Upgrade your Cummins valve springs and retainers with our Fleece Performance spring and retainer kit. Our springs are manufactured from “super clean” Hi-Tensile Chrome Silicon steel with a proprietary multi-step heat-treating process that minimizes load loss. These springs have a seat pressure of 105 lbs with an open pressure of 195 lbs at maximum lift. The retainers are thru-hardened 4140 chrome moly steel and have a black oxide finish.
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov