Performance Valve Springs and Retainer Kit Powerstroke 6.7 The XDP High Output 220

The XDP High Output 220 Amp Alternator almost doubles the factory output

Simple Installation

Each kit comes ready to install with the brackets

Bring your Powerstroke back to life with the XDP 6

This is their famous street setup / daily driver turbo that can still hook up to a trailer when it needs to

Performance Valve Springs and Retainer Kit Powerstroke 6.7 The XDP High Output 220The XDP Performance Valve Springs and 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