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USD 484.95
Part #: XD385

XDP HD Rocker Arm Shafts XD385

Vehicle Fitment:
2001-2023 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P | See full application list below
Part #: XD385
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The XDP HD Rocker Arm Shafts XD385 are specially designed to minimize the common oiling issues in the 2001-2023 GM 6.6L Duramax engines. From the factory, the oil supply to the rocker arm is shut off as the valve is opened. This lack of lubrication can cause excessive wear on your valvetrain and premature failures, especially in high performance applications.

The XDP Shafts feature revised oil grooves that align with the oil hole in the bushing so you maintain a consistent oil supply. These shafts are manufactured from hardened 4130 chromoly for extreme durability. Each shaft comes ready to install and has threaded pipe plugs at each end so the shafts can be cleaned, inspected, and hot tanked during an engine rebuild. 

  • CNC Machined
  • .250" Wall Thickness
  • 4130 Chromoly Steel Construction 
Shipping Restrictions Apply shipping restriction icon This product can not be shipped to these states/provinces: CA


  • MPN XD385
  • SKU XD385
  • ID 102966
  • Manufacturer Name XDP
  • Shipping Weight 7.00 lb.
  • Shipping Length 18 in.
  • Shipping Width 14 in.
  • Shipping Height 6 in.
  • Fuel Type Diesel
  • Warranty Info 1 Year / Unlimited Mileage
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Internal L0R2


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