[video]Refer to the YouTube video below, and you will have a better understanding of the working principles of the catalytic converter and tailpipe. Thanks to Automotive System [/video] Description YITAMOTOR'S Catalytic converters are Compliant with EPA emission standards to reduce direct emissions of harmful gases such as CO, HC, NOx, etc. Reduces fuel consumption by stabilizing the accuracy of the engine’s oxygen system signal and controlling fuel injection. Fitment 2010 2011 Chevy Impala 3.5L2006-2009 Chevy Impala 3.5L/3.9L2007 Chevy Monte Carlo 3.5L2006 Chevy Monte Carlo 3.5L/3.9L Professional installation would be highly recommended Features 1. Maximum Efficiency for Exhaust Flow Internal honeycomb ceramic substrates have a porous structure to increase the reaction area and ensure sufficient catalysts (Pt, Rh, Pd) on the coating surface for a higher conversion rate. 2. Stainless steel shell, Durability Adopts heavy-duty T409 stainless steel shell that highly resists heat, rust, and corrosion for longer service life, with no worry about bending or melting even in extreme conditions. 3. EPA Federal Standard Certificated All YITAMOTOR catalytic converters are stamped with an exclusive EPA number on the shell. YITAMOTOR offers a 5-year or 50,000 miles limited warranty, for any manufacturer defect. 4. Eliminate P042 Code Error This catalytic converter can eliminate the “check engine light” caused by code P0420 (catalyst system efficiency below threshold). Before replacing a catalytic converter, please make sure your O2 sensors function properly. Faulty sensors can cause damage to spark plugs, and catalytic converters, and damage your fuel economy. 5. Attention If your vehicle is registered in California, New York, Colorado & Maine, DO NOT BUY This item.If your vehicle MEETS California REQUIREMENT, BUT NOT REGISTER In California, New York, Colorado & Maine. This will work on your vehicle.Due to the increased emissions standards. This item is not certified for sale in California, New York, Colorado & Maine. Package Included 1 X Catalytic Converter w/Installation Accessories [specification] Specification Brand YITAMOTOR Certifications OBD-II / Federal EPA / Non-CARB Material Stainless steel Restricted States California, New York, Colorado & Maine Fitment Type Direct Replacement Dimensions 33.5 in. overall length Connection Type 2 Bolt Welded Flange Inlet type Singel (2-bolt welded flange) Outlet type Singel (2-bolt welded flange) Oxygen Sensor Location Post-Catalyst Substrate Ceramic Interchange Part Number 18366, 642235 Other Part Number 54693, 54019 Warranty 5 Years or 50,000 Miles Limited Package Includes 1x Catalytic Converter w/Installation Accessories [/specification] California Residents: Prop 65 Warning WARNING: Cancer and Reproductive Harm Visit:www.p65warnings.ca.gov [des] - Internal Honeycomb Structure Design for Max Exhaust Flow- Improve the Efficiency, Clear the P0420/P0430 Code- Use Shockproof Packaging to Reduce Deformation or Damage- Not Legal for Sale in CA, NY, CO, and ME- 5-Year or 50,000-mile Limited Warranty [/des]