Precision Injection Molded – Direct replacement. Note: Do Not fit S-line and S4 / RS4 bumpers. Comes with Quad outlet Decorative muffler tips. Product Descriptions: The rear end of a car underbody is where a diffuser is usually located. It accelerates the velocity of the airflow underneath the car to create downforce. The pressure under the car is affected by the diffuser so that it can expand back to ambient in the diffuser, as the car moves forward, such that the pressure decreases while the velocity increases. Since the pressure below the car is lower than on the side and above the car, downforce is produced if implemented correctly. The diffuser “drives” the underbody, which produces the downforce. Rear Bumper Diffuser -Comes Unpainted. Impact resistant and flexible. Direct install with no modification required. Note: Designed for Basic Models Only Decorative Muffler Tips -Perfect Fit. Quad Exhaust Tip, Round, Chrome. Durable Stainless Steel Construction. Improve the performance of your vehicle with organized air flow. Material: Rear Diffuser – Polypropylene Decorative Muffler Tips – Stainless Steel Zinc Plated Hardware – Iron. What’s in the box: 1 x Rear Diffuser 1 x Pair of Decorative Muffler Tips (Left, Right) 1 x Mounting Bracket Necessary Hardware Included. What you might need to install: Basic Hand tool. Installation manual is not included. Professional installation is highly recommended. We are here to assist you! Contact a sales tech by clicking on Ask A Question! If your question or request is urgent, or regarding an order in process, please give us a call! Your satisfaction is important to us! Contact a sales advisor by clicking on the Ask A Question button for help processing a return. MY ORDER WAS DAMAGED IN TRANSIT. It is our responsibility to take care of it but they must be reported to us immediatly. YOU SENT ME THE WRONG ITEM! The item “2009-2012 Audi A4 S4 Style Rear Diffuser Bumper Valance Body Kit Conversion Trim” is in sale since Wednesday, September 30, 2020. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Exterior\Body Kits”. The seller is “motorbyte” and is located in Rowland Heights, California. This item can be shipped worldwide.

• Brand: MTB
• Other Part Number: Replacement Conversion Upgrade For Basic Models Only Muffler Tip
• Interchange Part Number: 8K0 807 521 Bumper Trim Sport Aerodynamic S-4 S4 Style Type
• Item Condition: New
• Warranty: 90 DAY
• Color: Grey, Chrome
• Manufacturer Part Number: 09 10 11 12 2009 2010 2011 2012 Rear Valance Valence Under Body
• Material: Polypropylene
• Surface Finish: Unpainted, Chrome
• MPN: 191674