Without even flinching, the GT Supercharger adds 50 horsepower to the VQ without any need to tune the F-CON -HKS already does the hard part for you by pre-setting/tuning the unit. After adding a dual Hiper exhaust, the car picked up another 18 hp. Significant gains can be seen in the torque curve, which nearly shot up 80-percent after the exhaust was installed.