Features: Made of high quality PP - Polypropylene Unpainted Black R-Spec V2 Style Better match with 15-17 Ford Mustang NOT for vehicles with premium package Easy installation 100% Brand New Details: Unique Design. The rear diffuser combs the airflow at the bottom of the car, allowing the air to pass through the chassis faster and more smoothly, so that the air flow rate in the upper part of the car is smaller than the flow rate in the lower part, so that a stronger downforce can be generated to press the air on the track. This will be more stable and faster. Superior Quality. Made of high quality PP - Polypropylene and will stand the test of time. It has good impact resistance, toughness, resistance to various organic solvents and acid-base corrosion, and can maintain good condition for a long time. Installation. Our rear diffusers are stylish and generous. The entire installation is simple and easy, without excessive additional modifications. Suitable for our Mustang model, not for vehicles with premium packaging. Comes With 30 Days Warranty. The rear diffuser has a 30-day limited warranty. If you are not satisfied with the product, please feel free to contact us. We will be happy to serve you and provide you with the most intimate and satisfying service. Great Compatibility. Fits 15-17 Ford Mustang R-Spec V2 Rear Diffuser Lower Valance for Non Premium PP