Feature: 1. Replacement Parts: Outboard piston kit, 66T 11636 00 OE, with piston ring, perfect for E40 40X 40HP 2 stroke outboard motor, remove the old part and install it as a direct replacement. 2. Rust Resistant And Durable: Outboard piston set, manufactured from premium metal alloy with rust resistant properties, ensures high overall durability and stability. 3. Professional: Outboard engine piston kit is professionally manufactured to meet or exceed OEM specifications to ensure form and function to match original equipment. 4. Enhanced Performance: Designed to replace old and damaged pistons, providing more complete sealing performance and more powerful mechanical energy. 5. Reliable And Durable: This outboard piston ring kit is built to withstand the rigors of marine engines and provide reliable performance after extended use. Specification: Item Type: Outboard Piston Kit Material: Metal Alloy OE Number: 66T 11636 00 Piston Diameter: Approx. 80.5mm / 3.17in Installation Type: Replacement for original part, direct replacement Application: Replacement for E40 40X 40H 2 Stroke Outboard Motor. Package List: 1 x Outboard Piston Kit (4 Accessories) Note: 1. Before purchasing, please check the part number and model to ensure compatibility. 2. If you are not a professional, it is recommended to seek the assistance of a professional mechanic for installation to ensure the best shopping experience.3. Manual measurement, please allow some errors.