There are no power gains from forged pistons, at least speakable gains. Forged piston should probably only be used in the highest horsepower applications because they do cause your engine to wear faster. In comparison to hypereutic pistons they have to have a larger clearance to the cylinder wall because they expand more with heat. They are stronger but with the more clearance the forged pistons tend to have a slight knock at start up until they heat up, that will wear down you engine a lot quicker. If you don't intend to go all out with your motor or don't intend to use nitrous then stick with the hypereutic pistons. Oh and TRW makes forged pistons for our engines, they also have complete rebuild kits for good prices.