aFe Power Gas Down Pipe for Audi A4 2009 - 2016

Performance Gains: This system produced gains of up to +6 HP and +14 lbs. x Ft. TQ. , as measured on our in-house dyno.3" 304 Stainless Steel Construction: This system is constructed of 3" mandrel-bent 304 stainless steel tubing for maximum strength and durability.High Flow Catalytic Converter: Includes a single high flow catalytic converter which is less restrictive than the factory converter providing maximum flow.Heavy Duty Flanges: Factory style laser cut stainless steel flanges are used used for a secure leak-free seal.Includes 3rd O2 bung: This down pipe includes a 3rd O2 bung and plug for either a wide-band O2 gauge or auxiliary instrumentation.Installation: Utilizing a factory style hanger and flanges this system is designed to fit in the stock locations with no cutting or modifications required for a hassle-free installation.Computer-Aided Design: Utilizing state-of-the-art computer-aided design technology, this false is designed for custom, high tolerance factory fitment.TIG-Welded: 100% TIG-Welded for race-proven strength and durability.Emissions Disclaimer: This product is EPA compliant, not for sale or use on vehicles certified for the state of California. Consult your state or local authority for any additional clarification. Replacement of catalytic converters (if equipped) is allowed only under the following conditions: 1) if the vehicle is missing a converter; 2) if a state or local inspection program has determined the existing converter has been lead-poisoned or damaged or otherwise needs replacement; or 3) if the vehicle is more than five (5) years old or has more than 50,000 miles and a legitimate need for replacement has been established and documented. This product only fits those vehicles as listed in the application table.aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.