GT-MX Pack
For Assetto Corsa on PC · Requires Custom Shaders Patch 0.2.11 or later
GT-MX Pack 1
The unrestricted GT experience. GT-MX is an independent performance category built beyond traditional GT regulations: increased power, revised aerodynamics, a more aggressive visual direction and the sounds to match, while remaining grounded in real-world motorsport intent.
Three cars are available now, with the fourth to follow. The pack is currently discounted and the price will increase once all four cars are released. The GT-MX cars operate independently and are not intended to have a Balance of Performance against each other.
Included Cars
GT-MX Protech P92 F6 R
- Unrestricted Flat-Six Power: Naturally aspirated 4.2L flat-six producing up to 620 hp, approximately 20% above contemporary GT output.
- Renn Specification: Advanced lightweight construction with reduced drag and increased downforce compared to homologated GT machinery.
- Driver Configurability: Multiple headlight configurations, detailed cockpit systems and refined electronics.
- Focused Physics: Balanced for high-speed circuits while retaining realistic mechanical feedback.
GT-MX Macca V8
- Twin-Turbo V8 Performance: Output exceeding 700 hp with a significant uplift over its GT counterpart, plus an additional power boost worth a further 50 hp.
- Extended Aero Package: Larger front splitter, revised rear wing assembly and optimised cooling architecture.
- Lightweight Evolution: Reduced overall mass and improved weight distribution for sharper response.
- Track-Oriented Electronics: Refined traction mapping and updated performance logic.
GT-MX Mercer Extreme V8
- High-Output V8: Naturally aspirated platform delivering over 680 hp through a six-speed sequential gearbox, with three driver-selectable engine maps.
- DRS and Launch Control: Driver-operated rear wing DRS with an Auto DRS mode, and launch control with selectable launch rpm and automatic wet-track adaptation.
- Detailed Cockpit Systems: Live multi-function display, steering wheel LEDs that follow the car's systems, animated air jacks and an optional strict anti-stall.
- Vehicle Detail and Sound: Six liveries each with its own bumper strip colour, animated driver visor and glasses, and a deep V8 engine note with high-fidelity positional sound.
GT-MX Blackthorn V8 Apex (coming by February 2027)
- Extreme Aero Configuration: Pikes-inspired aerodynamic profile with significant downforce gains.
- Enhanced V8 Output: High-revving engine configuration tuned for aggressive circuit performance.
- Widebody Evolution: Expanded stance and revised cooling layout.
- Advanced Suspension Setup: Developed to handle the increased load and performance envelope.
Each vehicle features original high-fidelity sounds, advanced physics and detailed lighting systems. Cars are delivered separately as development milestones are completed.
Vehicle Read Me
Each GT-MX manual covers installation, vehicle features, controls, displays, configuration options and the RSS Settings application.
GT-MX Protech P92 F6 R
Refer to the documentation included with the download.
GT-MX Macca V8
Refer to the documentation included with the download.
GT-MX Blackthorn V8 Apex
Available on release.
Version History
Latest release: GT-MX Mercer Extreme V8, version 1.0
| Vehicle | Version | Date |
|---|---|---|
| GT-MX Mercer Extreme V8 | 1.1 | November 2026 |
| GT-MX Macca V8 | 1.0 | April 2026 |
| GT-MX Protech P92 F6 R | 1.2b | February 2026 |
| GT-MX Blackthorn V8 Apex | -- | Coming by February 2027 |
Requirements
Compatibility
- Compatible with the PC version of Assetto Corsa.
- Custom Shaders Patch (CSP) is required to operate these vehicles.
- Minimum required CSP version: 0.2.11.
- Install the supplied RSS Settings application to access the vehicles' dedicated controls and display settings.
- Vehicles may have a high computer processing requirement.
Digital Delivery
- GT-MX Pack 1 is delivered digitally through Sellfy.
- Cars are delivered separately as development milestones are completed.
- Each download includes the vehicle, its supporting RSS application and documentation.
Documentation
- Read the included manual for installation and initial setup instructions.
- Online manuals, where available, can be accessed through the Read Me tab.
Policies & Licensing
Sales Policy
- All sales are final.
- Refunds apply only to genuine duplicate transactions.
- Purchasing a car individually and later within a package does not qualify as a duplicate. Refunds or partial refunds are not available in that case.
Commercial Use
Commercial use of Race Sim Studio content requires explicit written permission from Race Sim Studio.
Content Protection
Unauthorised extraction, modification, redistribution, or distribution of Race Sim Studio content is prohibited.



























