707 Style Carbon Fiber Cavitation Extension Plate for K&B 7.5cc or 11cc Lower Units.This plate bolts on to the bottom side of the OEM cavitation plate of a K&B 7. 5cc or 11cc lower unit. It requires drilling 4 holes through the existing cav plate. Stainless hardware is included. This provides a longer and wider cavitation plate surface and improves down force and handling. Slight trimming may be needed, depending on which version of the lower unit that you have.