This is a genuine CORTECO oil filler cap, part number 220048H. 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. The cap also helps to contain oil vapors within the engine, contributing to efficient operation and reduced emissions. CORTECO is known for its commitment to quality and precision manufacturing. This oil filler cap is built to meet or exceed original equipment specifications, ensuring a perfect fit and long-lasting performance. Replacing a worn or damaged cap with this CORTECO part will help maintain optimal engine health and prevent potential issues related to oil contamination or leakage.