Cummins ISX 3680650 Exhaust Manifold Kit PAI 181072CROSS REFERENCE: 3680650 APPLICATION: Cummins ISX BRAND: PAI 181072 Cummins 3680650 Exhaust Manifold Kit PAI 181072. Replacement engine parts support reliability. Diesel performance parts improve exhaust flow. Designed for efficiency 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. This part is