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XD326 XDP Roller Rocker Arm Assembly Set - Dodge 5.9L/6.7L Cummins 1998.5-2018

SKU: XD326
Mftr. Part#: XD326
UPC: 856217008625
The XDP Roller Rocker Arm Assembly Set is the ultimate upgrade for the rocker arms in your 1998.5-2018 5.9L/6.7L Cummins truck.

PRODUCT DETAILS (click to expand)

Mftr. Part#XD326

PRODUCT SPECS (click to expand)

Attribute nameAttribute value
Truck Type/ModelDodge
Product TypeRocker Arms
BrandXDP (Xtreme Diesel Performance)


The XDP Roller Rocker Arm Assembly Set addresses multiple weak points to give you a valvetrain that will support extreme horsepower while giving you the durability and reliability that you expect from your diesel engine. This set is built using the materials, components and manufacturing processes that have been tested and proven in top fuel and blown alcohol racing engines. Take the performance and reliability of your truck to the next level with this direct bolt-on kit.

The XDP rocker arms feature a revised design with added mass that triples strength over the factory arms, manufactured from a proprietary grade of heat-treated tool steel for extreme durability. The roller tips drastically reduce friction between the valve bridge and rocker arm while reducing side thrust on the valve guides to decrease wear. The high load bronze bushing provides a replaceable wear surface and friction reduction when compared to the oem rocker arms. The rocker arms come with ultra durable high-quality adjusting screws manufactured from H-13 tool steel that has been heat-treated, triple tempered, and nitride coated for long-lasting performance & reliability. The XDP rocker arm trunnion set is made from premium tool steel that is also hardened and nitride coated, the upgraded trunnions have been machined to increase oil supply for maximum lubrication in the most extreme applications.


  • Bolt-on installation
  • Stock rocker arm ratio
  • Increased strength & reliability
  • No additional modifications required
  • Includes rocker roller arms, adjustment screws, billet bridges, & rocker arm trunnions