Performance Valve Springs and Retainer Kit Cummins 6.7 Even in mild builds

Even in mild builds

producing plenty of flow for worn injectors that have high return

Supports Up To 750HP

It features a KC turbos 10 blade turbine wheel

this unit is built to meet OEM specifications

Performance Valve Springs and Retainer Kit Cummins 6.7 Even in mild buildsThe 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