Our Bosch P7100 injection pumps are built to order. Because of the P7100's numerous output calibrations and configurations (truck, rv, marine, mileage, extreme hp, etc). Plus each customer performance requirements are different from one customer to the next, we will require you to send in your original pump or a rebuildable core. We will build you a custom pump along with any upgrades you would like such as 4000 rpm governor springs, fuel plates, delivery valves, timing, 13mm plunge barrels, etc. If you don't have a pump and don't know what injection pump to get, give us a call and we can recommend a pump for your performance goals.