Cummins 4330744 Oil Drain Return Tube PAI 181151CROSS REFERENCE: 4330744 3686636 APPLICATION: Cummins Multiple Use Application. DETAILS: Oil Drain Return Tube 23. 35in Overall Length Edge Rounded. BRAND: PAI 181151 Cummins 4330744 Oil Drain Return Tube PAI 181151. Heavy duty and diesel truck. Supports oil return control and turbo lubrication stability. 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