HKS SLD (Speed ​​Limit Defencer)

Removes speed limiter operating at 180km/h

Most domestic cars are always equipped with a speed limiter function, and when the speed is over 180km/h (140km/h for light cars), the fuel is cut and the speed is controlled so that it does not go beyond that.
On the other hand, recent domestic cars have become more powerful, and even non-sport models can reach speeds of 180km/h (140km/h for light cars).
Therefore, in circuit driving, the speed limiter is easier to operate while driving.
SLD is a device that cancels this speed limiter function and makes full use of the vehicle's performance, making it possible to run at 180km/h (140km/h for light vehicles) or more.

For more details please go through the below link...
HKS SLD (Speed ​​Limit Defencer)