The 2020 Mercury Racing 450R is a high‑performance supercharged outboard engine designed for offshore and competition boats. It features a 4.6‑liter V8 FourStroke powerhead with a Mercury Racing supercharger and charge‑air cooling, delivering excellent acceleration and top‑end speed while maintaining reliability typical of Mercury Marine products. Built with advanced materials, electronic fuel injection, and SmartCraft engine management, it’s engineered for serious performance boating.