Billet Specialties 20120 polished billet valve cover breather. Precision machined from 6061-T6 billet aluminum. Features a unique two-piece design with a positive o-ring seal and washable filter element. Notice the attractive smooth polished styling. Fits common custom valve covers with 1.22 breather holes. Sold as one breather. Billet Specialties 20120 21120 Billet valve cover breather 20120 Billet Specialties 21120 valve cover breather. This breather has a hose barb for a 3/8" hose for positive crankcase ventilation. Precision machined from 6061-T6 billet aluminum. Features a unique two-piece design with a positive o-ring seal and washable filter element. Notice the attractives smooth polished styling. Fits common custom valve covers with 1.22 breather holes. Sold as one breather. 21120 We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.