Use this exhaust when you want to enhance your Audi A4's performance on the road or track. It's great for Audi owners who love speed and style. The exhaust has dual 90mm (3.50 inch) slash - cut tips. These tips work with the factory Sedan rear valance, with both on the left side of the car. The tips are engraved with AWE logos and are double - walled for long - lasting shine. You can adjust each tip to your personal taste.