Mack 158GB5126M Engine Mount PAI 803974CROSS REFERENCE: 158GB5126M APPLICATION: Mack ASET E7 Multiple Use Application. BRAND: PAI 803974 Mack 158GB5126M Engine Mount PAI 803974. Diesel truck parts and commercial truck parts. Maintains engine stability and controls vibration 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 brand