Abstract: A system and method for variably altering the dynamics of a bowling ball. The system includes a bowling ball, one or more weight holes arranged along the outer perimeter of the bowling ball and extending radially inward therein forming an open cavity therebetween, and one or more removable weight inserts configured to be inserted into and frictionally engage the respective weight holes during an operational use thereof such that the one or more removable weight inserts substantially cover and close the one or more weight holes. Each of the removable weight inserts have a positive or negative weight effect and include indicia designating the weight of the respective removable weight insert.

Abstract: A method for making a manifold for a tube and fin type heat exchanger wherein the manifold is a one piece aluminum extrusion. The manifold includes a U-shaped channel having a base member and a pair of vertical walls, a plurality of fluid conducting passageways in the base member, and a pair of hollow longitudinal fluid conduits. The conduits are then crimped at predetermined locations to form fluid baffles and the manifold is then sealed. The baffles include slits which allow a bonding agent to secure the baffle within the fluid conduit.