As an avid automotive enthusiast, I've found that the Sachs NFW9122 flywheel has exceeded my expectations. Based on my observations, it's an excellent addition to my performance car's drive train. The flywheel is made with high-quality materials, providing my car with a smooth shift and greater power. One downside is that the installation process can be daunting for car owners who are not familiar with working on their vehicles. Overall, I would recommend this flywheel to anyone looking to upgrade their car's performance.