Description
New PAI replacement belt tensioner kit, part number 880891, for select Mack applications. Cross-references Mack 21568412. Confirm fitment by original part number before ordering.
What comes in this kit:
- Belt Tensioner (PAI 880878, OEM 21454379) – qty 1
- Belt Serpentine (PAI 880867, OEM 21556636) – qty 1
- Screw (PAI 840001, OEM 421GC266M3) – qty 2
Fits: 2006 Mack MP7.


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