Forged Pistons
Due to the manufacturing process of forged products they are much stronger than a standard cast version.
High compression or turbocharged engines geared towards performance will operate better with the use of forged pistons. The wide variety of customizable designs that a forged piston provides allows engine builders to suit the shape of the piston with the kind of performance benefit they want to achieve. This also makes it easy to properly tune and enhance engine tolerance during testing and actual use.
Modified or turbocharged engines are subject to higher amounts of mechanical stress and have to rely on durable parts designed specifically for extreme amounts of abuse. Using forged pistons in the engine setup will definitely yield performance points that will suit any preferred modification on the engine.