The VERTEX Piston Kit KTM Pro HC is crafted to withstand the higher cylinder pressures of 4-stroke engines. These pistons are made from premium forged aluminum alloy (2618) to endure the internal pressure of the engine efficiently. To minimize wear and tear, each VERTEX piston is coated with MOS2 on the piston skirt. VERTEX is an OEM supplier to some of the largest motorcycle manufacturers, including many factory teams in MXGP that rely on VERTEX's high performance. The kit includes piston, piston ring(s), piston pin, and piston pin clips. The 4-stroke Pro HC model features a forged special piston designed for higher compression and enhanced performance.