56110-ZVP-003 Piston Rod - Overview. The 56110-ZVP-003 Piston Rod is an essential component in the hydraulic steering system of Honda marine engines. It functions as the critical link between the piston and steering arm, effectively transferring force to enable precise directional control of your outboard motor. Designed for reliability and longevity, the piston rod supports the smooth operation of Honda marine power steering systems, ensuring safe, responsive handling in demanding aquatic envir