RM Engineering GT4+ RS Roof Fin For TOYOTA A90 SUPRA

Engineered for Maximum Performance. Inspired by Gazoo Racing GT4 Racecars. Proven on Track.

The Ridgeline Motorsport GT4+ Time Attack Aero Kit is our most comprehensive aerodynamic package for the Toyota GR Supra A90 platform.

Developed from the aerodynamic foundation of the Toyota GR Supra GT4 race car, the GT4+ system evolves beyond the limitations of the original GT4 rulebook. Each component has been redesigned using real-world track testing and competition experience to increase aerodynamic performance while maintaining a balanced relationship between front and rear downforce.

The complete package combines the GT4+ front lip, tunneled front splitter, canards, rear wing, hood vent, and roof fin into one integrated aero system for serious track-day drivers and time attack competitors.

Vehicle Fitment

Designed for:

• Toyota GR Supra A90/A91 Supra

Please confirm your vehicle year, bumper configuration, hood configuration, and competition-class requirements before ordering.

Track-Proven Performance

The GT4+ Aero Kit was developed and tested on road-going A90 Supras equipped primarily with bolt-on modifications.

The recorded results below were achieved on vehicles with no significant weight reduction and using 275/35R18 200TW street-class tires.

A90 Supra Testing Results

GRIDLIFE — WeatherTech Raceway Laguna Seca

• Best recorded lap: 1:33.962
• Stock turbo
• Stock transmission

Global Time Attack Finals — Buttonwillow CW13

• Second place
• Best recorded lap: 1:49.132

Real results. Real podiums. Real validation.

GT4+ RS Roof Fin

The GT4+ Roof Fin is inspired by Porsche 992 GT3RS and it helps manage airflow as it travels from the roof toward the rear wing.

It is designed to improve airflow stability around the rear of the vehicle and support more consistent rear-wing performance.

Roof Fin Features

• Designed to manage airflow toward the rear wing
• Supports improved rear-wing efficiency
• Adds a distinctive motorsport appearance
• Developed as part of the complete GT4+ aero package