Billet Specialties 20320 cross flags 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 engraved flames styling. Fits common custom valve covers with 1.25 breather holes. Sold as one breather. Billet Specialties 20320 21320 flame billet aluminum valve cover breather 20320 Billet Specialties 21320 valve cover breather. Precision machined from 6061-T6 billet aluminum. This breather has a hose barb for a 3/8" hose for positive crankcase ventilation. Features a unique two-piece design with a positive o-ring seal and washable filter element. Notice the attractive engraved flames styling. Fits common custom valve covers with 1.25 breather holes. Sold as one breather. 21320 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.