Impreza GDB GDA with SUS Power Air Filter and Zero Sports Intake This is a SUS POWER CORE TYPE LM for Subaru Impreza (GDB/GDA), along with Zero Sports piping. Compared to the normal piping, it adds an accent to the engine room, and the sound of the back turbine and acceleration become smoother. The air filter has been used for 1300km, but I think it's still usable.