Use this rear diffuser when you want to enhance the look and performance of your 2004 - 2007 Porsche 911 Carrera 997. It's perfect for car enthusiasts who love to customize their vehicles. Made of FRP material, it's lightweight yet strong. This one - piece diffuser is designed to fit all 2004 - 2007 Porsche 997 models and comes with a specific part number 117363. Just remember, it must be used with 117291 and professional installation is a must.