An optional feature on the 2015 - 2017 RS3, ROUSH Heat Extractors are the ultimate addition to the hood of your 2015 - 2017 Mustang GT, as they add an aggressive touch while remaining fully - functional. The Heat Extractors are molded raw black and help to release heat away from the engine. The material, light - weight TPO and ABS is durable, heat resistant, and impact resistant. ROUSH has used ABS in the making of countless products, proving its quality. As with all ROUSH products, the Heat Extractors are manufactured in - house and were designed using original manufacturer CAD data for superior quality and optimum fit, and come with the necessary hardware and instructions. 2016 - 2017 MY fitment does not allow for factory turn signal, found in factory extractor, to carry over ROUSH heat extractors are designed to fit the 2015 - 2017 Mustang GT Hood and require minimal drilling and basic hand tools to install. Other 2015 - 2017 Mustang hoods may require cutting.