This is a genuine CORTECO oil filler cap, part number 220105S. Designed to fit specific vehicle models, it provides a reliable seal for your engine's oil system. Properly sealing the oil filler is crucial for preventing oil leaks and contamination. This cap is manufactured to meet high-quality standards, ensuring a snug fit and durable performance. Replacing a worn or damaged oil filler cap with this CORTECO part will help maintain the integrity of your engine and protect it from external elements. It's a simple yet important component for routine engine maintenance.