HKS Speed Defense Limiter

Most JDM vehicles are equipped with a factory speed limiter that restricts vehicle speed to 180 km/h. While intended as a safety measure, this limiter can prevent drivers from fully utilizing the performance potential of their vehicles—especially since many JDM models, including non-sport variants, are capable of safely exceeding this speed.

The HKS Speed Limit Defencer (SLD) is designed to eliminate the factory speed limiter, allowing the vehicle to drive beyond 180 km/h and unlock its full performance capability. By removing this restriction, the HKS SLD lets you take advantage of the vehicle’s true potential where conditions and regulations permit.

For CAN Communication System

• Lately, some vehicles are equipped with "CAN Communication System" (*1) to control the vehicle's speed. This CAN communication system complicates elimination of the speed limiter. However, HKS SLD type III utilizes a new method to control the speed data in CAN communication system and eliminate the speed limiter.

No ECU Data Modification

• HKS SLD type I does not rewrite the factory ECU data; the speed limiter can be eliminated without modification of the ECU data.

Features

• HKS found the way to pick up the speed signal from other signals transmitted by CAN communication system to eliminate the speed limiter.
• The original control method of CAN communication system enables the vehicle's digital speed meter to indicate the speed over 180km/h.
• The speed limiter can be eliminated even after rewriting the ECU program to connect the unit to the ECU harness.