2001-2016 Duramax Rocker Arm Spacer KitThe Duramax Rocker Spacer Kit was designed to eliminate the factory springs in between the rockers to keep the rockers properly aligned to OE spec under high load and high rpm conditions. The factory springs allow the rocker arm shafts to move around which can cause improper valve lift and irregular wear on the valves and rocker arms. Our high performance rocker arm spacers prevent this from happening and allow your engine to operate more efficiently

we HIGHLY RECOMMEND this kit to protect your investment

Whether you're operating trucks

For optimal engine break-in and long-term performance

Fire Ring Head Gasket sold separately

Stock up with this case of MaxMPG and ensure superior fuel performance and engine protection year-round

these Premium Stock Plus heads provide a dependable foundation for your Duramax

1994–1998 Dodge Ram 3500 5

Improved mileage

Each 1-gallon jug treats up to 3

Excursion 2004-2010 E Series 2006-2010 4

Serdi uses a solid carbide straight shank pilot

Restore confidence in your 2004