This is the branched pipe for introducing intake air into the engine.
This was conventionally made from metals such as aluminum, but by using plastics or magnesium as the material, a significant weight reduction has been achieved. In order to improve engine output from low speed to high speed and optimize fuel economy, a function for changing intake pipe length and chamber volume in response to driving conditions is introduced. In addition, intake resistance is low and is designed to be evenly distributed on each cylinder.