This is an optional Hot Racing Aluminum Dual Water Outlet for the Traxxas Spartan and M41. Features: CNC machined billet aluminum construction Dual water outlet Blue anodized finish for durability, corrosion resistance, and great looks Replaces factory plastic component Requires: Drilling an additional hole in the boat hull Adding a second water line Comments: For ultimate cooling, combine with Hot Racing dual pickup rudder blade and HRASPN36WC01 CNC milled aluminum cooling jacket.