Spectre's High Performance Push-In Breather was designed for valve covers with a 1-1/4 inch breather hole. With a triple chrome-plated steel top and base and an overall height of 3-1/4 inches, this breather features a 2-3/8 inch tall filter element made from our blue synthetic fiber filter media. Manufactured using high quality materials and designed for a universal fit, this high performance breather/vent air filter comes complete with a grommet for quick installation. Note: Legal in California only for racing vehicles which may never be used, registered, or licensed for use upon a highway. See spectreperformance.com for CARB status on each part for a specific vehicle.