Vertex Piston Kit (Honda) TRX400EX 99-08. STD- +1MM.

Italian made pistons and rings are designed to be an O.E.M. replacement.Gravity cast aluminum alloy with an 18-20% silicone content for a light, strong piston.Molybdenum bisulphide coated piston skirts for increased piston life.All pistons are heat treated with a T-5 hardening and tempering cycle.