Ridgeline Motorsport GT4+ Kit for F80 M3 & F82 M4

The Ridgeline Motorsport GT4+ Aero Kit represents the pinnacle of performance-focused aerodynamics for the BMW F‑chassis (F80 M3 / F82 M4). Developed and tested on track, this modular system draws inspiration from BMW Motorsport’s GT4 race cars — but goes beyond GT4 rule restrictions to deliver serious downforce and balance for street and time-attack applications.

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Key Features

• Proven Track‑Proven Design: Tested with road‑going F8X cars (no weight reduction) with 275/35/R18 200TW street tyres. Ridgeline Motorsport

• Front Lip & Splitter System:

  • Reinforced GT4‑inspired lip to seal the front plane when used with the splitter. Ridgeline Motorsport

  • Two-piece lip + splitter design. Ridgeline Motorsport

  • Integrated airflow channel for lower oil cooler, plus a moulded one-piece tunnel for added rigidity. Ridgeline Motorsport

  • Optional aluminium skid‑block for extra protection. Ridgeline Motorsport

  • All mounting hardware included (though minor OEM chassis modification is required). Ridgeline Motorsport

• OEM‑spec GT4 Canards: True GT4 geometry for enhanced front-end bite and mid/high-speed stability. Ridgeline Motorsport

• Rear Wing:

  • Redesigned chassis-mount to avoid water-leak issues common with OEM GT4 wings. Ridgeline Motorsport

  • Larger foil than OEM GT4 (unrestricted), providing more rear downforce without sacrificing efficiency. Ridgeline Motorsport

• Modular System: You can buy the full kit or pick individual components — lip, splitter, canards, wing. Ridgeline Motorsport

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Compatibility

• Chassis: BMW F80 (M3) / F82 (M4) Ridgeline Motorsport

• Regulations: Designed to comply with GTA Street Class and GridLife Street Mod. european auto source+1

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Ideal For

• Track-day and time-attack drivers looking to maximise aerodynamic performance

• Enthusiasts who want race-inspired aero without GT4 rule restrictions

• Builders aiming for a balanced aero setup front to rear

• Cars with minimal weight reduction, allowing use of standard street tyres

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Why Choose Ridgeline’s GT4+ Kit

• Performance-Driven Engineering: Engineered from real-world track data and optimised for genuine downforce. Ridgeline Motorsport+1

• Proven Results: Achieved podiums in SuperLap Battle, GridLife, and Time Attack finals. Ridgeline Motorsport

• Flexible Buying Options: Modular design lets you pick only what you need or go for the full aero suite.

• High-Quality Materials: Built with motorsport-grade components that balance strength, weight, and function.

• Street & Track Legal: Suits both competitive and enthusiast street setups while staying within common regulations.