Cummins Belt Tensioner 3978021 3976833 Compatible for Cummins Engine 4BT 4BTA 6CT

Replace Part Number: 3978021, 3976833

Fit for Engine: Cummins 4BT, 4BTA, 6CT, 4B3.9, 6B5.9, B4.5 CM2350 B146C, B5.9 G, B5.9 GAS PLUS CM556, B5.9 LPG PLUS CM556, ISB CM850, ISC8.3 CM2250, QSB4.5 CM2250 EC, QSB4.5 CM2350 B106, QSB4.5 CM850(CM2850), QSB5.9 30 CM550, QSB5.9 CM850, QSB6.7 CM850(CM2850), QSK95 CM2350 K143C, QSL9 CM850(CM2850)