DHD's High Pressure Pinned Duramax Oil Pump is an excellent addition to any engine build. DHD shims each pump in-house to produce approx 15-30% more oil pressure safely and dependably. Each pump is pinned to prevent slippage under high RPM and stress.
All of our wet sump high performance engine builds receive one of these upgraded oil pumps before leaving DHD.
Keyed Drive Gear, Pinned Shaft
Inspected and Measured Gear Set
Left Hand Threaded Input Shaft, Includes Nut
Includes Drive Gear
OE GM Housing
Oil Pressure Modification
Utilizes LML Oil Pickup Tube
GM Pump # 12644591
Note: Oil pressure readings may vary based on engine configuration, bearing clearances, engine RPM, etc..