Cummins 3976620 Camshaft PAI 191834CROSS REFERENCE: 3976620 APPLICATION: Cummins 6C ISC ISL Multiple Use Application. BRAND: PAI 191834 Cummins 3976620 Camshaft PAI 191834 supported by heavy duty and truck components. Provides reliable valve operation for stable engine performance and long service life. 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.