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 grommets kit when used for 1-1/4 inch valve cover holes. Product Features:Use with grommet kit 5339 or 5333 to adapt to a 1-1/4 inch holeFit into 3/4 inch diameter grommet holeInternal baffle also prevents oil splashDesigned to provide excellent ventilationTriple chrome-plated steel