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.
- Conical spring design
- Safe to operate up to 5,000 RPM
- Essential for elevated boost levels
- Complete set of springs, locks & retainers
- Installed height: 1.940"
- Installed pressure: 172 lbs
- Open pressure: 375 lbs @1.275"
- Coil bind 1.225"