DHD 800-155 Duramax Add-On Belt Idler Kit 2003-2016 LB7 LLY LBZ LMM LML

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.

Features:

• Increases Belt to Balancer Contact
• Bridges Gap in Belt Routing
• Easy 1 Bolt Install
• Kit Includes Pulley, Stand Off, Bolt and Tap
• Does NOT fit 2001-2002 Early LB7 Blocks 

Fitment:

Use the menu above to select your engine model.

• DHD# 800-155A Short Standoff - LB7, LLY, LBZ, LMM (2003-2010)
• DHD# 800-155B Long Standoff - LML (2011-2016)