Castle is excited to return to the boat market after a decade long hiatus. We are pleased to present the Hydra XLX2! Overview The Hydra XLX2 is based on our popular and powerful Mamba XLX2 ESC. We've removed the air cooled heatsink and added a watercooled heatsink. It is finished off with an aluminum top plate for a clean look. Attached to the top plate are two aluminum, w....

Product Overview Introducing the newest addition to the world of RC hobby boats, the HYDRA X 8S. With its sleek design and powerful performance, it will push RC boats to their limits for the ultimate thrill ride on the water! The HYDRA X 8S is based on our popular and powerful Mamba Monster X 8S. We've removed the air cooled heatsink and added a water-cooled heatsink. The ....