Feature: 1. Applicable Model: Piston kit is fit for 40HP E40MH 40X outboard engine, please confirm whether your model is applicable before buying. 2. OE Number: The part number of piston kit for reference is 66T 11631 01 93, please confirm whether it is consistent with the OE you need. 3. Improved Performance: Replacing old or worn out parts with a new piston kit can significantly enhance the overall performance of your outboard engine, improving fuel efficiency and power output. 4. Rustproof Materials: These kits is made of metal alloy, ensuring durability, anti corrosion and anti rust under harsh marine conditions and extreme operating temperatures. 5. Easy Install: Piston kit come with everything needed for a comprehensive installation, making installation relatively straightforward even for those with limited mechanical knowledge. Specification: Item Type: Piston Kit Replaces OEM: 66T 11631 01 93 Piston Diameter: Approx. 80mm / 3.1in Installation Type: Direct Replacement for Original Parts Fitment: Fit for 40HP E40MH 40X outboard engine Fit for E40MLHW-REV 1998 Fit for E40MLHX 1999 Fit for E40MLHY 2000 Fit for E40MLHZ 2001---up. Package List: 1 x Piston Kit (8 accessories) Note: 1. Please double check the part number and fitment of your item, matching information is for reference only 2. If you are not professionally advised to look for a professional mechanic to assist with installation to ensure the best shopping experience.