XD389 XDP Performance Valve Spring & Retainer Kit - Dodge 5.9L Cummins 1989-1998

Overview

The conical design of the XDP Performance Valve Spring & Retainer Kit offers improved valve control over a basic straight spring. The conical shape allows for a smaller and lighter weight spring retainer that is more robust due to the reduction in size. Unlike other aftermarket valve springs this valve spring kit can be used on a wide range of applications from stock to race-built engines making it the perfect "one and done" upgrade that lets you upgrade in the future to support more power. Each spring is subjected to a stress relief process and is computer load mapped to give a superior-quality product with long term resilience. Tested with 1 lb of seat pressure this valve spring & retainer set comes complete with locks, retainers, springs and is supported with 1 year of warranty.

Features

• Conical spring design
• Safe to operate up to 5,000 RPM
• Essential for elevated boost levels
• Complete set of springs, locks & retainers

Specifications

• Installed height: 1.940"
• Installed pressure: 172 lbs
• Open pressure: 375 lbs @1.275"
• Coil bind 1.225"