• Specifically engineered for Pre-OBDII equipped vehicles.
• Lower emissions output.

• Long term reliability.
• Industry's most comprehensive coverage.
• 409 stainless steel shell and neck construction for longer life.

• Manufactured from high quality materials.
• Designed to meet the needs of older higher milage vehicles.
• 5-year/50,000 mile warranty on converter body.
• 25,000-mile warranty on emissions.

This catalytic converter has been designed and manufactured to meet the emission performance requirements specified by the Federal EPA for Pre-OBDII vehicles. OBDII systems were not mandatory until 1996 so most vehicles manufactured prior to 1996 are Pre-OBDII with some exceptions. Please refer to your vehicle documentation and/or manufacturer to determine your vehicle's OBD status.

The catalytic converter is a marvel of chemical and engineering technology. It cleans gases passing through vehicle's exhaust systems. Catalytic converters typically consist of a ceramic or metal honeycombed monolith substrate that carries precious metal catalysts. The coated substrate is wrapped in an protective thermal mat that expands when heated, securing and insulating the substrate, which is contained in a tough stainless steel shell and becomes a component in an engine exhaust system. As exhaust gases pass over the catalysts, chemical reactions occur that convert pollutants into harmless gases and water. Hydrocarbons combine with oxygen to become carbon dioxide. Nitrous oxides react with carbon monoxide to produce nitrogen and carbon dioxide, and with hydrogen to produce nitrogen and water vapor. AP Exhaust chemists and metallurgical engineers have this expertise.