Cummins ISL 3969609 Cylinder Head Gasket PAI 131945CROSS REFERENCE: 3969609 5529517 APPLICATION: Cummins ISL BRAND: PAI 131945 Cummins 3969609 Cylinder Head Gasket PAI 131945 truck engine parts and heavy truck parts. Ensures precise head seal and maintains compression for durability. 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 built brand new with