Spectre's 3/4 inch push-in chrome valve cover breather has a chrome plated housing and features an internal baffle to help prevent oil splash and provide superior ventilation. This product is designed to work with valve covers that have a 3/4 inch to 1-1/4 inch breather holes. We recommend using our 5339 or 5333 grommit kit when used for 1-1/4 inch valve cover holes.