Cummins 3920758 Timing Gear Housing PAI 060089OEMCROSS REFERENCE: 3920758 3920518 3918872 3917759 3910411 3905731 3903276 APPLICATION: Cummins 6B 5. 9 ISB QSB Multiple Use Application. DETAILS: Genuine Part BRAND: PAI 060089OEM Cummins 3920758 Timing Gear Housing PAI 060089OEM. Truck repair parts and heavy truck parts. Maintains front housing alignment and supports clean operation. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over