It is designed by taking advantage of HKS successive time attack experience. The wing cross section and gurney flap shape are designed using fluid analysis, aiming for low drag and high downforce. We have conducted a circuit test and confirmed that the downforce has been improved compared to the normal body for both front and rear. ・Position stability during braking ・Improved drivability when entering high-speed corners and turning It will be a body kit with a front/rear aerodynamic balance. It has been confirmed that the effect can be clearly experienced even in the actual driving scene.