Compared to their forged equivalents, Porsche’s new pistons are 10 percent lighter and feature a built-in cooling duct.
https://www.thedrive.com/tech/34775/porsche-found-a-way-to-3d-print-lightweight-pistons-that-add-even-more-horsepower
origin - https://www.pipiscrew.com/2020/07/porsche-found-a-way-to-3d-print-lightweight-pistons-that-add-even-more-horsepower/ porsche-found-a-way-to-3d-print-lightweight-pistons-that-add-even-more-horsepower