This is a genuine CORTECO oil filler cap, part number 220115S. It is designed to provide a reliable and secure seal for your engine's oil filler opening. A properly functioning oil filler cap is crucial for preventing oil leaks and keeping contaminants out of your engine. This CORTECO cap is manufactured to meet high-quality standards, ensuring a snug fit and long-lasting performance. Replacing a damaged or missing oil filler cap with this CORTECO part will help maintain the integrity of your engine's lubrication system and protect against potential damage caused by debris or moisture ingress.