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DHD 800-155 Duramax Add-On Belt Idler Kit 2001-2016 LB7 LLY LBZ LMM LML

800-155A/B - 13C
Pricing: $119.95

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Stabilize your serpentine belt under high load and high rpm with DHD's add-on belt idler kit. These kits require no belt changes and no modification to belt routing. Simple 1 bolt installation in a factory hole.


  • Increases Belt to Balancer Contact
  • Bridges Gap in Belt Routing
  • Easy 1 Bolt Install
  • Kit Includes Pulley, Stand Off, Bolt and Tap


Use the menu above to select your engine model.

  • DHD# 800-155A Short Standoff - LB7, LLY, LBZ, LMM (2001-2010)
  • DHD# 800-155B Long Standoff - LML (2011-2016)


Shipping Information

  • Item Requires Shipping
  • 3.0 lbs.
  • W6.0000” x H6.0000” x L6.0000”

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