Cummins ISX/ISX15 3683789 Center Exhaust Manifold PAI 181055CROSS REFERENCE: 3683789 5579055 APPLICATION: Cummins ISX ISX15 BRAND: PAI 181055 Cummins 3683789 Center Exhaust Manifold PAI 181055 truck engine parts and heavy duty truck parts. Ensures exhaust gas control and maintains reliable engine efficiency. 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