RM ENGINEERING GT4+ KIT For TOYOTA A90 SUPRA

Ridgeline Motorsport GT4+ Time Attack Aero Kit

Engineered for Maximum Performance. Inspired by TOYOTA Motorsport. Proven on Track.

The Ridgeline Motorsport GT4+ Kit is our ultimate aero package for the A90 platform—developed using the aesthetic foundation of the OEM A90 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 A90s with no weight reduction with 275/35/R18 200TW Street Tires Only. A90 Testing Results to Date:

Gridlife Laguna Seca: 1:33.962 (Stock Turbo/Stock Transmission) A90 Supra

Global Time Attack Finals – Buttonwillow CW13: P2 – 01:49.132

Real results. Real podiums. Real validation.

Included Components

GT4+ Front Lip

A reinforced, GT4-inspired design that creates a sealed front plane when paired with the splitter.
Can be used without the splitter, though lifespan will be reduced.

GT4+ Tunneled Splitter

Two-piece lip + splitter system

1-piece molded tunnel for increased downforce and rigidity

Optional aluminum skid block kit (+$99)

Includes all hardware; minor OEM chassis modification required

GT4+ Canards

For improved front-end bite and increased mid/high-speed stability.

GT4+ Rear Wing

Redesigned mounting solution eliminates the water-leak issue found in the OEM GT4 wing

Larger foil than OEM GT4 (no GT4 rule limitations)
→ More rear downforce with similar aerodynamic efficiency

GT4+ Hood Vent

For reducing front end lift and cooling, featuring larger vent area than OEM GT4

GT4+ Roof Fin

For increased rear wing efficiency

Why Choose the GT4+ Kit?

Inspired by TOYOTA 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