XDP PERFORMANCE VALVE SPRINGS & RETAINER SET XD386

The XDP Performance Valve Springs & Retainer Kit XD386 are a perfect upgrade for your modified 2001-2016 GM 6.6L Duramax. Camshaft upgrades and other modifications that increase boost require more valve control. The XDP Performance Valve Spring feature a conical design for better valve control than a standard straight spring. The conical design also allows for smaller and lighter spring retainers. Each spring undergoes a stress relief process and is computer load mapped, to ensure quality and long-term reliability. Each  spring is matched within 1 lb of seat pressure to ensure consistency. Sold as a complete set with valve springs, retainers, and locks. Each kit is backed by XDP's 1-year unlimited mileage warranty. FEATURES:  125 Lb. Seat Pressure Conical Spring Design  Performance Valve Spring Kit Essential For Elevated Boost Levels  Complete Set (Springs, Locks & Retainers) Specifications: Installed Height: 1.610” Installed Pressure: 125lbs  210lbs @ 1.110”  Coil Bind: 1