Cylinder Works 07-15 WR 450 F/06-09 YZ 450 F Big Bore Cylinder Kit

OEM in apperance, yet performance driven in design. The Cylinder Works Big Bore Cylinder Kits contain a hand matched big bore Vertex piston and top end gasket kit wtih o-rings in an all-in-one kit, providing cost savings over purchasing OEM components separately.

• High-quality 2618 aluminum alloy for superior strength and durability
• Increased horsepower and engine displacement