The Spec 98-05 Volkswagen Beetle / 99-06 Golf IV / 99-05 Jetta IV Aluminum Flywheel is a lightweight aluminum flywheel designed for use with the specified Volkswagen models. It is designed to reduce rotational mass and improve engine response for improved acceleration and performance. It is constructed from high-strength aluminum and features a high-grade friction surface for optimal performance. It is also designed to offer increased durability, improved clutch engagement, and a smoother driving experience.