The 2025 GR GT Prototype is the official cover car for Forza Horizon 6, making its video game debut in the stunning Japanese setting. Classified as an S1 car at launch, it’s a precision-built road-legal race car with a hybrid 4.0L V8 twin-turbo engine and a rear-mounted 8-speed automatic transmission. To get the most out of this beast, tuning is essential, focusing on its low center of gravity and high torque output. Here’s how to make it dominate on the track.
Performance Build Priorities
Tires & Brakes
The GR GT comes with Michelin Pilot Sport Cup 2 tires and Brembo carbon-ceramic brakes. For serious S1 competition, upgrade to full Race Tires. These will give you more grip in corners, letting you exploit the car’s aerodynamic design fully. Don’t forget, brakes are already strong, but Race Pads will help in heavy braking zones.
Weight Management
Even with its lightweight aluminum chassis, further Weight Reduction upgrades are a must. Reducing mass improves both acceleration and braking, crucial in FH6’s S1 meta.
Key Tuning Settings
Aerodynamics
This car is built with "aerodynamics first." Use the adjustable race front and rear wings to suit the track:
- Grip-focused setup: Max downforce for technical circuits with lots of corners.
- Speed-focused setup: Lower downforce for highways or long straights to increase top speed.
Gearing
The 8-speed transaxle has a “wet-start clutch.” Upgrade to Race Transmission and adjust the final drive so the car stays in the engine’s power band (~650+ PS). This gives smooth acceleration without killing your top speed.
Suspension
- Camber: Front -2.5° to -3.5°, rear -1.5° to -2.5°. Keeps tires planted in corners.
- Tire Pressure: Warm pressure 30–33 PSI. Use telemetry to check that the inner third of the tire is 10°–15° hotter than the edges for balanced grip.
- Differential (LSD): Since it’s RWD-biased, set Acceleration 65–80% to prevent wheel spin, and Deceleration 15–30% to improve corner turn-in.
Driving Strategy
Launch Control
Hold both the E-brake and throttle when starting from a standstill to optimize RPM and reduce wheel spin.
Braking Tips
At high speed, the car can feel twitchy. Slightly shift Brake Balance toward the front (51–52%) to keep the rear stable under heavy braking.
Cornering
Thanks to the aerodynamics and grip tuning, focus on smooth steering inputs. Aggressive over-corrections can upset the RWD setup, especially in technical sections.
With these tuning tips, the 2025 GR GT Prototype can dominate both city streets and mountain passes in Forza Horizon 6. The key is balancing aerodynamics, grip, and power to match your racing style—whether blasting down highways or carving tight technical corners.
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