Vertex 23630B Piston Kit - Standard Bore 66.35mm

Vertex 23630B Piston Kit - Standard Bore 66.35mm All pistons are heat treated with a T-5 hardening and tempering cycle. All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life. Cast piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston. Forged pistons are forged from 2618 aluminum for superior strength and durability. Forged High Compression pistons improve power and torque across entire rpm range. Big Bore pistons increase engines displacement, torque, and peak horsepower. Forged Replica pistons are forged OE replacements. Replica pistons and all rings are OEM replacements. Compression RatioSTD Cylinder Diameter66.400 mm Displacement250 cc Piston Diameter66.350mm FITMENT: 250 EXC (06-18,24); 250 EXC Six Days (06-17,24); 250 EXC Six Days TPI (18-22); 250 EXC TPI (18-22); 250 SX (06-24); 250 XC (06-19,24); 250 XC TPI (20-23); 250 XC-W (06-18,24); 250 XC-W TPI (18-23); Freeride 250 R (14-17); EC 250 (21-24); EX 250 (22-23); MC 250 (22-24); TC 250 (14-24); TE 250 (11-18,24); TE 250 i (18-23); TE 250 (11-14)