This is a genuine CORTECO oil filler cap, part number 220054H. It is engineered to provide a reliable and tight seal for your vehicle's oil filler opening. A properly functioning oil filler cap is crucial for maintaining the integrity of your engine's lubrication system. It prevents dirt, debris, and moisture from entering the crankcase, which can lead to premature wear and damage. CORTECO is known for its high-quality sealing solutions, and this oil filler cap is no exception. It is designed to meet or exceed original equipment specifications, ensuring a perfect fit and long-lasting performance.