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BBR Big Bore Cylinder Upgrade performance and reliability with the BBR Big Bore Cylinder, engineered for riders who demand increased power and smoother throttle response. Precision-machined for exact tolerances, this cylinder delivers consistent combustion and improved efficiency for a wide range of off-road and street bikes. Increased displacement: Bigger bore for more torque and horsepower. Durable construction: High-grade alloy with hard-anodized or Nikasil finish for wear resistance and long life. Precision fit: CNC-machined surfaces ensure reliable sealing and reduced blow-by. Improved cooling: Optimized porting and surface treatments for better heat dissipation. Easy installation: Designed to match OEM mounts and piston sizes for straightforward swap. Ideal for tuners and enthusiasts seeking a straightforward, high-impact upgrade, the BBR Big Bore Cylinder balances performance gains with durability. Pair with a compatible piston, gasket kit, and proper jetting for best results. Specifications: Available in multiple bore sizes. Check fitment for your make and model before purchase.