OEM-style gaskets supplied with the catalytic converter Part Number 54021 Inlet Gasket No Inlet Type A Bolt-On O2 Port Upstream sensor located before the catalytic converter to monitor the air/fuel mixture, and a downstream sensor after the converter to check its efficiency. | 2 Outlet Gasket No Outlet Type A Bolt-On Substrate Material Ceramic | Stainless Steel | 409L Stainless Steel Type Audi A4, A4 Quattro/Volkswagen Passat Cateran Premium OEM Replacement Direct Fit Catalytic Converter | Catalytic Converter Weight 9.00 lbs Height 21.00" Width 6.00" Length 5.00" Buyer's Guide 2005-1998 VOLKSWAGEN PASSAT Catalytic Converter, 2005-2000 AUDI A4 QUATTRO Catalytic Converter, 2006-2000 AUDI A4 Catalytic Converter Interchange Data Brand Part Number No interchange data available.
