Mack 30QS3373M Cab Mount PAI 803978CROSS REFERENCE: 25114976 25496771 30QS3373M 30QS4212M APPLICATION: Mack CH CL CT CX Multiple Use Application. BRAND: PAI 803978 Mack 30QS3373M Cab Mount PAI 803978. Truck parts and diesel parts. Controls cab movement and ensures consistent chassis support during operation. 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