i recently upgraded the gasket in my automotive engine with the Fel Pro TCS 45166 Timing Gasket. As a result of my tests I determined that this gasket significantly improved the engine's performance. The gasket's high-quality construction and precision fit resulted in reduced oil leakage and enhanced durability. However, the only drawback I noticed was the slightly higher price compared to other options in the market. Nonetheless, the positive impact on engine efficiency makes it a worthwhile investment..