This AKRAPOVIC Exhaust Springs is a perfect fit for Yamaha FZ-09, MT-09, and XSR900. It is designed to enhance the performance of your motorcycle's exhaust and emission system, ensuring a smoother ride. The brand is well-known for its high-quality motorcycle parts, and this product is no exception. The springs are made to last and withstand the rigors of the road, ensuring that your exhaust system remains efficient and effective. It is a must-have for any motorcycle enthusiast who wants to improve their bike's performance. This product is compatible with a factory exhaust system and is easy to install. Fits below models and years. MUST HAVE FULL SYSTEM, WILL NOT FIT FACTORY PIPING!  (044C00)PH