Mack 446GC1241 Sleeve O-ring Lower PAI 8913 (Pack6)CROSS REFERENCE: 446GC1241 6V4314 APPLICATION: Mack E7 Multiple Use Application. BRAND: PAI 8913 Mack 446GC1241 Sleeve O ring Lower PAI 8913. Heavy duty parts and heavy duty. Maintains seal integrity and supports consistent cooling control under load. 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