PolyForce Tensioner ID: 689406 Cummins ISC & ISL

PolyForce™ Belt Tensioners by Kit Masters replace the traditional spring with a longer-lasting, Polymer Torsion Core. They also feature upgraded pulley bearings to drastically extend the life of the belt tensioner.

*Mounting hardware not included

2 Year/200,000 Mile Warranty

Replaces OEM Part #:

3945627, 49581, 3945849, 49521, 89406, 3281583, 38516, 3565151, D1186-2406, RE164876, VKM910021, 87436755, 38627, 20490732, 3976834, 3976831, 3973819, 3969564, 3957434, 3945527, 3936213, 3936205, 3934821, 3917440, 3914095, 914086,