Tamiya FS-12FD Aluminum Heat Sink Head #41083This is a new aluminum heat sink head for the 2.1cc FS-12FD engine, found on #43529 Mad Spirit and #43531 Vodafone AMG-Mercedes C-Class DTM 2006. Not only is it much lighter than the standard heat sink head, its blue-colored finish also features distinctive Tamiya logos.New in original Tamiya package.Usable with FS-12FD engines.