Cummins 6B/5.9 3943872 Front Exhaust Manifold PAI 181035CROSS REFERENCE: 3943872 3942225 3943871 APPLICATION: Cummins 6B 5. 9 BRAND: PAI 181035 Cummins 3943872 Front Exhaust Manifold PAI 181035 intended for replacement engine parts and heavy truck. Ensures stable exhaust routing and reduces stress. 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