Forged 81.50mm Bore Piston

The Wiseco K003M815 is a performance piston crafted from aerospace-grade, forged 4032 alloy aluminum, ensuring maximum strength and durability for demanding engine applications. This piston features precision tolerance CNC machining for consistent quality and performance. Its design incorporates complex dome and crown shapes, optimized skirt profiles, and valve pockets suitable for power adders like turbochargers and nitrous oxide systems. The K003M815 piston has a bore diameter of 81.50mm and a compression height of 30.00mm, with a wrist pin outer diameter of 0.827 inches. It is designed for engines such as the Geo 4AFE Prism (1989-1992 and 1993-1997 models) and the Toyota 4E-FTE & 5E-FE engines. The included wrist pins are constructed from chrome moly steel for superior strength, and the pin bores are honed for a precise fit. The piston is also deburred for enhanced reliability and comes standard with Wiseco's ArmorGlide coating to reduce friction and noise, potentially freeing up horsepower.