56120-ZVP-003 Piston Rod - Overview. The 56120-ZVP-003 Piston Rod is a crucial component within the hydraulic power trim and tilt system of Honda marine engine systems. It acts as the essential mechanical link transmitting force from the piston within the power trim and tilt assembly, ensuring smooth and responsive movement necessary for optimal boat handling and performance. Designed to strict Honda OEM standards, it ensures seamless integration with existing parts, maintaining optimal performa