A boat hull configured to create a desired wake shape through a combination of two distinct hull types that interact with the water flow at specified moments. Controlled shaping of the wake shape is achieved through redirection of water flowing across the transom of the main hull, onto a secondary transom of a secondary “diffuser” suction hull that creates a negative pressure that sucks the aft portion of the boat hull into the water, thereby immersing the secondary transom into the water where it can effectively interact with the water and “carve” the desired wake shape desirable for wake surfing.