81.00mm Bore Forged Piston Kit

The Wiseco K673M81AP piston kit is engineered for performance in the 1993-2001 Honda Civic Si, featuring an 81.00 mm bore and an 8.1:1 compression ratio. Constructed from a 2618 Aerospace alloy, these pistons offer a superior strength-to-weight ratio, crucial for high-performance applications. For heavy horsepower applications, an HD2 severe duty forging is available, and the pistons feature a strutted forging for enhanced strength. This piston kit requires the use of a .040 gasket. Specifics include a connecting rod length of 5.287" (134.3 mm), a block height of 7.992" (203 mm), and a compression height of 1.181" (30 mm). The dome volume is -8cc, and the head volume is 42.70 cc. The kit includes pin part S621/18mm and ring 8100XX.