Fleece Spring and Retainer Set (FPE-34797) for 1998.5-2018 Cummins 5.9L / 6.7L

The Fleece Spring and Retainer Set (FPE-34797) is a high-performance upgrade designed for 1998.5 to 2018 Cummins 5.9L and 6.7L diesel engines. Engineered to handle increased boost levels and higher RPMs, this set includes heavy-duty valve springs and precision-machined steel retainers that help prevent valve float and maintain valvetrain stability under demanding conditions. Ideal for performance builds and towing applications, the Fleece Performance Engineering kit ensures reliable operation and improved engine response. Its direct-fit design allows for straightforward installation, making it a popular choice among Cummins enthusiasts looking to enhance durability and performance.