The 3289056 V Ribbed Belt 8PK1651 is designed for optimal performance and durability, precisely fitting Cummins engines 4B3.9, 6B5.9, B3.9, B4.5, C8.3, ISB, F3.8, F4.5, QSC8.3, QSB3.9, QSB4.5, and QSL9.