XDP PERFORMANCE VALVE SPRINGS & RETAINER KIT FOR 2001-2016 GM 6.6L DURAMAX bypasses this kit retains ESC compatibility

this kit retains ESC compatibility and functions with BlueCruise-equipped trucks

Agressive Exterior Sound

using less energy for brighter light

Zone Offroad uses premium steel components

and tires you've installed on your Gladiator

XDP PERFORMANCE VALVE SPRINGS & RETAINER KIT FOR 2001-2016 GM 6.6L DURAMAX bypasses this kit retains ESC compatibilityThe 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