Mack 454GC5236A Camshaft PAI 8789ECROSS REFERENCE: 454GC4263 454GC5236 454GC5236A 25128291 APPLICATION: Mack E tech Aset Multiple Use Application. DETAILS: Late BRAND: PAI 8789E Mack 454GC5236A Camshaft PAI 8789E. USA truck parts and replacement truck parts. Supports consistent valve timing and reliable camshaft performance. 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