Slip-Ons represent the first step in the exhaust system tuning process, and they offer a great balance between price and performance. Change the nature of your bike by adding more power, improved performance, and the unique Akrapovi? sound. Everything packed in stylishly designed Slip-On exhaust systems. The result of taking design very seriously is a beautifully crafted exhaust system with a titanium muffler outer sleeve and plenty of carbon fiber parts. Race-proven materials.With the muffler please choose additional mandatory needed link pipe L-D12SO2 (as shown on the product image) or the Evolution header E-D12E1/1. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.