10 0 Cummins ISC 8.3 Belt Tensioner $50 USD Quality used cummins ISC 8.3 engine Dayco belt tensioner (serpentine belt) with 8 grooves, backed by our standard warranty. Vehicle Fitment, Cummins ISC, 2007-2014 Freightliner M2 Models... Quantity2ConditionUsedStock Number30AT-3973819-STK MLS Number13374880CategoryBelt Tensioners Last Updated8/19/2025 LocationBig Lake, MN, US Sold ByQuality Bus and Truck Parts (844) 580-___ SHOWNUMBERCall Seller Email Seller Save More Info