[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 The primary function is to convert toxic gases and pollutants to harmless gases that help to purify and treat car exhaust. Using it can help improve exhaust gas velocity and save horsepower and torque. Fitment 2010-2015 Toyota Prius 1.8L Professional installation would be highly recommended Features 1. Designed for excellent exhaust flow and clean emissions.2. Direct replacement for your factory converter.3. Bolts right into place - no welding, bending, or cutting!4. Internal catalyst has a honeycomb pattern for maximized surface area and minimized restrictions.5. Body and pipe heat shields are made of high-quality materials for durability.6. T409 steel construction and welded seams for long life and durability.7. Complies with EPA standards, non-CARB.8. 5-year / 50,000-mile warranty. 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 Warranty Warranty Period: 5-year / 50,000-mile warranty.Return: Goods can be returned within 30 days for Unopened or Unused Items.24-Hour Support: Customer service throughout the day. [specification] Specifications Brand YITAMOTOR Certifications OBD-II / Federal EPA / Non-CARB Material Stainless steel Restricted States California, New York, Colorado, Maine Fitment Type Direct Replacement Inlet Type 2 Bolt Welded Flange Outlet Type Pipe Connection Oxygen Sensor Location Post-Catalyst Engine 1.8L Substrate Ceramic Interchange Part Number 16649, 642889 Package included x 1 catalytic converter w/Installation Accessories Warranty 5 years or 50,000 miles limited [/specification] California Residents: Prop 65 Warning WARNING: Cancer and Reproductive Harm Visit:www.p65warnings.ca.gov [des] - Stainless Steel Shell, Long-lasting Durability- Use Shockproof Packaging to Reduce Transportation Damage- Metal Shaping Process, Fit Seamlessly to Prevent Leakage- Not Legal for Sale in CA, NY, CO, and ME- 5-Year or 50,000-mile Limited Warranty [/des]