This Mercury gear housing assembly is a perfect fit for your outboard engine. It is designed for 40-60HP EFI Big Foot engines with a 2.33:1 ratio and a standard rotation. The assembly is made with high-quality materials to ensure durability and long-lasting use. It is important to note that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm, as indicated by the California Prop 65 Warning. For more information, please visit www.P65Warnings.ca.gov. This gear housing assembly is a must-have for any boater looking to enhance their outboard engine's performance. Comes with what’s pictured. If there are any discrepancies with your order, please reach out to us before leaving a comment. We accept returns and provide refunds in the case of damaged items and items listed incorrectly.