Cummins ISB 3806285 Piston Ring Set Std PAI 505191CROSS REFERENCE: 3806285 APPLICATION: Cummins ISB DETAILS: Bore (mm) 103. 000 Ring Count 3 BRAND: PAI 505191 Cummins 3806285 Piston Ring Set PAI 505191 intended for engine replacement and truck components. Supports efficient combustion and reduces oil leakage. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over 50 years of experience in the heavy duty truck parts industry. This part is