This is an aluminum short impeller model for 948 engines with a short impeller. We also sell the long impeller model for 1275 engines. If you are going to adapt to the long impeller model to move more water, make sure the impeller will clear the cylinder casting for the number one cylinder. Comes with gasket.
Installation tip: make sure the dowel pin fits properly in your block casting before bolting the pump into the block. We have had pins that need to be ground slightly in order to allow the pump to fit flush to the block. Any issues with this depth will cause leaks around the pump face.