Namura Piston Kit for 2011 14 Polaris RZR 900 XP models 92.96mm NA 50090 B 2013 Harley Davidson FLHTCUTG Tri Glide Ultra Classic Part Number: 4289M06550 Part Number: 4289M06550 Product Details Product Line Wiseco Piston Rings Part Number 2244XE Fitment Type Model Size Specific Fitment Use Type Replaceent Part for Wiseco Aftermarket Piston Kit ONLY Unit Sale Qty Ring Kit for Single Piston Style XE Style Rings Size Position Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Material Color Finish Functional Length Cable Sleeve Length Cable Sleeve Travel Driver Seat Length Passenger Seat Length Driver Seat Width Passenger Seat Width Overall Seat Width Overall Seat Length Piston Cylinder Size 57 Higher silicon content reduces expansion rates and increasesÊwear resistance Namura piston kits come with the piston