ALL pumps built with top quality parts and workmanship. Requires core exchange. This is NOT included in the purchase price. "Due to the age and limited availability of cores a serviceable core exchange unit is required, and must match unit purchased. This core must be returned within 30 days or a non refundable core charge of $450 will be applied. Prompt return of cores is critical in order to maintain stock levels for prompt service." -JK "Includes, but not limited to models # 4502, 4544, 4723, 4779, 4790, 4875, and 5056. We must know your pump model number to build you the correct part." - JK

ALL DB2 4911 pumps will come with updated head/rotor assembly, and in most cases new housing. First quality rebuild with no corners cut! Requires core exchange of like series pump within 30 days or a NON refundable $400 core charge will be added. "One of the classic symptoms of a failing 4911 pump is hot no-starts. The truck will sometimes start if the glow plugs are forced on, and will typically start right up when cooled down. This is a sign of a failed/failing head/rotor assy and is VERY common. We ensure that these pumps have the replacement head/rotor assy's which are updated and much better." - JK