Mack 104GC5165AM3 Center Exhaust Manifold PAI 1848CROSS REFERENCE: 21090730 21090694 20705928 104GC5165AM 104GC5165AM3 104GC5165M3 104GC5165M 7421090730 4103 7421090730 APPLICATION: Mack E7 E Tech Multiple Use Application. BRAND: PAI 1848 Mack 104GC5165AM3 Center Exhaust Manifold PAI 1848. Diesel parts and heavy duty truck parts. Facilitates even exhaust routing and supports stable temperature. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified