Akrapovic Evolution Exhaust System for 2009 14 Yamaha YZF R1 S Y10RFT10 ZC 2 feed mpn PK1253 a patented design a patented design 00mm Final Engine Displacement 426cc California Emissions FALSE Product Disclaimer Fitment Note Cylinder boring required Fitment Note Fitment Note Fitment Note Fitment Note Product Details Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Product Line Akrapovic Evolution Line Exhaust System Part Number S Y10RFT10 ZC 2 Fitment Type Unit Sale Qty Kit Style Hexagonal Material Color Size Finish Carbon Fiber Muffler Sleeves Position Functional Length Cable Sleeve Length Cable Sleeve Travel Driver Seat Length Passenger Seat Length Driver Seat Width Passenger Seat Width Piston Cylinder Size Piston Size Added Cylinder Stroke Volume Final Engine Displacement Exhaust Configuration 4 into 2 Dual Muffler Exhaust System Muffler Size Muffler End Tip Style Carbon Fiber End Cap Windshield Height Windshield Width Handlebar Diameter California Emissions TRUE Product Disclaimer corrosion and excessive wear of parts of the exhaust system made of titanium (due to vibration and extreme temperatures)