Piston Kit - 78.00 mm - 13.2:1 CR - Honda Machined from 2618-T6 high-tensile forged aluminum, Domed top features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Internal and external bracing, dedicated embossed forgings for weight reduction, specialized processes such as internal milling the internal struts, along with dedicated accumulator groove and forged side relief, Kit includes piston(s), wrist pin, circlips and rings, Made in the USA