Features: Package includes: - Front Bell Heat Radiator (~4g lighter than the standard front bell) - Twister Fan (15000rpm @7.2V) - Exhaust Fan Holder (Transparent color in original. It can be painted it to other color) Usage: - Much improvement on the motor output efficiency by exhausting the heat inside the ¡ÆMotor Can¡Ç. - Useful in Modify race competition, especially in Stock race.