Part number 20220 is a polished billet aluminum valve-cover breather featuring the Chevrolet bowtie emblem machined into the top. Designed to press into a 1¼″ valve-cover hole, it uses a two-piece design with a washable internal filter element and a secure O-ring seal. A 3⁄8″ hose barb on the underside allows connection to a PCV system or catch can. For optimal crankcase ventilation, valve covers should be run with one breather and one PCV valve or PCV-style breather to ensure proper airflow and pressure balance.

• Application: 1¼″ valve-cover hole
• Top style: Bowtie emblem
• Material: 6061-T6 billet aluminum
• Finish: Polished
• Seal: O-ring, push-in design
• Serviceable: Two-piece housing with washable filter
• Outlet: 3⁄8″ hose barb for PCV or catch can use
• Quantity: Sold individually