3288900 ribbed belt (8PK1525), cross referenced 5690181, 3029060, 3911571, 3905866 suits Cummins 6C8.3, QSC8.3, ISM C and GAS PLUS engines. Optimized rubber compound resists fatigue caused by repeated flexing. Multiple ribs transmit power steadily for alternators, water pumps and other auxiliary devices. Reduces slipping noise in commercial vehicle running conditions.