The Hotrod is a community-created headwear item for the Engineer. It is a gray welding helmet with team-colored flame patterns. When the Engineer is holding a blueprint of a building or hauling a building, the Hotrod flips down over his face. If a Spy is disguised as a Engineer with this hat, and holds a sapper, the hotrod will be flipped down, and the diguised Spy will not appear to hold a building. This is a indication that a disguised spy is holding a Sapper.