XDP XD389 Performance Valve Spring & Retainer Kit 89-98 Dodge Ram 5.9L Cummins

One of the most overlooked performance parts in most 12V Cummins performance builds is the valve-springs. They may not be something you can see, but we can assure you, they are essential in ensuring your engine is operating properly with all your other performance parts. The factory springs are not designed to handle the elevated boost levels that are typical in modified applications causing valve float. This will drastically hurt your engine performance. This kit is a must have for your performance build.

This kit features a conical design that provides more valve control than a standard spring. This shape allows for a smaller and lighter spring retainer that is also stronger due to the size reduction. Unlike other valve springs on the market, this kit can be used on a wide range of trucks, from stock all the way up to performance builds. This is a perfect one-and-done upgrade that lets you modify your engine for more power down the road. Each spring is computer load mapped and then matched within 1 lb of seat pressure followed by a stress relief process to ensure quality and long term reliability.  Each set comes complete with springs, locks, retainers, and is backed by a 1 year manufactures unlimited mileage warranty.