Valve Spring and Retainer Kit for 5.9L Cummins

The XDP XD389 is a performance valve spring and retainer kit designed for 1989-1998 Dodge 5.9L Cummins engines. It addresses valve float issues caused by elevated boost levels common in modified applications. This kit features a conical spring design for improved valve control and a smaller, lighter, yet stronger retainer.

Each spring in this kit is computer load mapped and matched for consistent seat pressure, followed by a stress relief process to ensure quality and reliability. The kit includes springs, locks, and retainers, and comes with a 1-year manufacturer's unlimited mileage warranty. It is suitable for a wide range of trucks, from stock to performance builds.