Description

The HKS Speed Limit Defender (SLD Type I) is a compact, dedicated electronic module designed to safely and permanently remove the factory 180 km/h (112 mph) speed governor on the GR Yaris. By intelligently manipulating the vehicle speed signal on the car’s high-speed CAN communication network, it allows the vehicle to perform to its full aerodynamic and mechanical potential, a crucial modification for circuit driving and high-speed use. The SLD integrates seamlessly, requiring minimal wiring and ensuring the instrument cluster continues to display accurate speeds beyond the factory limit.

Product Overview & Purpose

Modern Japanese performance cars, including the GR Yaris, are electronically limited to a maximum speed of 180 km/h regardless of their actual capability. This limiter cuts fuel delivery once the limit is reached, preventing higher speeds. The HKS SLD Type I electronically disables this function by intercepting and modifying the vehicle speed data on the CAN bus, allowing the engine to continue producing power and the car to accelerate beyond the restrictive factory setting.

Product Highlights

🚫 Permanent Speed Limiter Removal
The SLD electronically cancels the 180 km/h speed governor, allowing the GR Yaris to accelerate to its natural top speed dictated by gearing, power, and aerodynamics. This is essential for safe track use where higher terminal speeds may be reached on long straights.

📶 Advanced CAN Bus Integration
Utilizes HKS’s proprietary analysis of the vehicle’s CAN (Controller Area Network) communication. It identifies and modifies only the specific vehicle speed signal packets, leaving all other critical data (for engine control, ABS, etc.) untouched. This ensures reliable operation without interfering with other vehicle systems.

📊 Accurate Speedometer Display
Unlike simpler devices that may cause the digital speedometer to freeze or display inaccurately, the HKS SLD’s intelligent signal manipulation allows the instrument cluster to continue displaying the correct speed even above 180 km/h.

🔧 Simple Installation & ECU Update Immunity
The compact module connects via an intercept to the vehicle’s CAN wiring. Crucially, because it operates on the hardware signal level, its function remains active even if the vehicle’s ECU software is updated or overwritten by a dealership, providing a permanent solution unlike some ECU reflash methods.

Technical Specifications

• Product Name: Speed Limit Defender (SLD Type I)

• Model Code: 4502-RA002

• Compatibility: Toyota GR Yaris (GXPA16, G16E-GTS, September 2020+).

• Primary Function: Removes factory 180 km/h speed limiter.

• Technology: CAN bus signal manipulation.

• Key Feature: Maintains accurate speedometer operation.

• Installation: Compact module with vehicle-specific wiring connection.

Performance Philosophy

• Goal: To provide a reliable, transparent, and permanent electronic solution for disabling the factory speed limiter, unlocking the vehicle’s full performance potential for sanctioned environments. The focus is on precision integration, preserving OEM functionality, and hassle-free operation.

• Focus: A specialized performance tool for track and high-speed driving. It is considered essential safety equipment for circuit use, ensuring consistent power delivery at high speeds, and is the ideal choice for owners who drive on unrestricted roads or private facilities.

Installation & Usage Notes

• 🔧 Professional Installation Recommended
  Installation requires tapping into the vehicle’s CAN bus wiring. While the module is small and the connections are few, professional installation by a qualified technician is highly recommended to ensure correct signal identification, secure connections, and proper mounting of the unit.

• ⚠️ Legal & Safety Disclaimer

  • The SLD is intended for use only on closed courses, racetracks, or in regions where public road speed limits are not in effect. It is the driver’s responsibility to comply with all local traffic laws and speed regulations.

  • Removing the speed limiter allows the vehicle to reach higher speeds, which requires appropriate tires, brakes, and driver skill to manage safely.