RM Engineering GT4+ WING For F8X M3/4

Ridgeline Motorsport GT4+ Aero Kit Engineered for Maximum Performance. Inspired by BMW Motorsport. Proven on Track. The Ridgeline Motorsport GT4+ Kit is our ultimate aero package for the BMW F8X platform—developed using the aesthetic foundation of the OEM M4 GT4 and evolved beyond GT4 rule-book limitations. By redesigning every component around real-world data, we’ve created a package that produces significantly increased downforce. Designed to comply with GTA Street Class and GridLife Street Mod regulations, the GT4+ Kit brings professional-level aero to the enthusiast and competitive driver alike. Proven Track Performance The whole Kit is designed to optimize performance for vehicles with bolt-on molds only. The test results are based on Road Going F8Xs with no weight reduction with 275/35/R18 200TW Street Tires Only. F-Chassis Testing Results to Date: SuperLap Battle 2025 – COTA (Fastest BMW in class, excluding 2 Supras) Laguna Seca: 1:34.341 Global Time Attack Finals – Buttonwillow CW13: P4 – 01:50.940 (Fastest BMW in class, excluding 3 Supras) Real results. Real podiums. Real validation. Included Components GT4+ Rear Wing Redesigned chassis-mount solution eliminates the water-leak issue found in the OEM GT4 wing Maintains OEM structural strength Larger foil (1600MM) than OEM GT4 (no GT4 rule limitations) → More rear downforce with similar aerodynamic efficiency Why Choose the GT4+ Kit? Inspired by BMW Motorsport, engineered for maximum performance Increased downforce front and rear Balanced aero for serious track performance Legal for popular street-class time attack series Modular system—purchase as a full kit or individual components Notes Full kit recommended for best aero balance All hardware included Splitter skid blocks optional Professional installation recommended Installation Info: GT4+ Splitter Installation PDF: https://ridgelinemotorsport.com/blogs/installation-guide/gt4-splitter-install-guide GT4+ Kit Installation Video: https://www.youtube.com/watch?v=eeoQ4eUPWqE https://www.youtube.com/watch?v=9hb8qY5Lxf0