Borla Cat-Back Exhaust System - S-Type (140631) 40410 This O2 sensor bung is

This O2 sensor bung is then required in order to installing an O2 sensor on your car

2 x Carbon Fiber Venturi Housings with Integrated Tubes

Wedgelocks

Designed to address the notably quiet stock exhaust

Borla Cat-Back Exhaust System - S-Type (140631) 40410 This O2 sensor bung isBorla S Type Cat Back Exhaust System for 2015 2019 Audi 8V S3 2. 0L 4 Cyl. Turbo All Wheel Drive 4 Door. (140631) Upgrading your factory exhaust system to a Borla stainless steel performance exhaust system with a more efficient and less restrictive design can improve sound (adding more enjoyment driving your vehicle) and increase engine horsepower and torque throughout the RPM range (allowing quicker acceleration to pass a vehicle or get to highway