Caterpillar 1457390 Intake Valve PAI 391947 (Pack2)CROSS REFERENCE: 145 7390 1457390 252 7801 2527801 APPLICATION: Caterpillar 3100 C7 Series Multiple Use Application. BRAND: PAI 391947 Caterpillar 1457390 Intake Valve PAI 391947. Aftermarket truck parts and truck repair parts. Provides airflow control and maintains steady valve 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