Headpipe - Monster 821/1200 - Offers an upgrade to a full system when used with an Akrapovic Slip-On exhaust system - Accepts both stock heat shield and optional carbon heat shield - Stock valve system will be removed

Evolution Exhaust - Titanium - Top-of-the-range full system beautifully crafted from high-grade ultra-lightweight titanium - Its distinctive shape was developed especially for the Yamaha YZF-R1 based on Akrapovic’s vast racing experience - Increased power and torque through the whole rpm range, especially in the mid range and top end - The deep, true racing sound is perfectly tuned to match the increased performance - It offers easy-to-fit installation - For perfect performance, throttle response, and durability, special mapping developed by Akrapovic in collaboration with Rapid Bike by Dimsport is recommended