The Engine +6 is the legendary engine that Macky, Sammy and Kirisa will mention about. It is only obtainable after obtaining 30 Flags, thus, can be used in the race against the Meister. This engine is the best engine available within the game, providing the best power and steering. After obtaining the 30 Flags, the protagonist may visit Poonk to obtain it.
It is noted that getting the Engine +6 and 30 Flags will make obtaining the Ship Horn and Elephant Horn unobtainable. It is recommended to turn in Poonk's Frog Ornament and talk to him for the Horns before obtaining the 30 Flags and talking to Poonk to get the Engine +6.