This secondary air injection check valve is designed to match the fit and function of the original valve on specified vehicles, and is engineered for durability and reliable performance.

Secondary A.i.r. Combination Valve 911-973 Features:

• Fits 2002-2004 Audi A6 Quattro; 2001-2005 Audi Allroad Quattro; 2002 Audi RS4; 2000-2002 Audi S4
• Direct replacement — this secondary air injection check valve is designed to match the fit and function of the original valve on specified vehicles
• Restores functionality — this valve is made to fit and fully restore part functionality after the original valve fails
• Durable construction — this part is made from quality materials to ensure reliable performance and long service life
• Trustworthy quality — backed by team of product experts in the United States and more than a century of automotive experience