Hands down, the Blue Spring Upgrade is the most cost effective upgrade you can make to your 6.0 that truly makes a very noticeable difference in power and drivability.
Designed as a direct replacement for the factory components, the "Blue Spring" Upgrade is a must-have on all 6.0L Powerstroke trucks. The elevated pressures from the complete kit increase overall performance, drivability, and also help to prevent damage to your injectors, while increasing longevity of vital fuel system components. The "Blue Spring" Upgrade Kit provides pressure increases around 10 PSI and is the perfect upgrade for any stock or modified pickup.