RM ENGINEERING RACE
RM Engineering GT4+ Wing For TOYOTA A90/A91 Supra
RM Engineering GT4+ Wing For TOYOTA A90/A91 Supra
SKU:DRMGT4PLSWINGA90160-BASE
- 1X 1600 mm GT4+ Pre-preg Carbon Rear-wing Mainplane
- 1 Pair Standard Pre-preg Carbon Flat Endplates
- 1 Pair Swan-neck Wing Uprights
- 1 Pair Vehicle-specific Trunk Mounting Bases
- 1 Set Complete Installation Hardware
- 1 Set Mounting Base Template
- 1X 1600 mm GT4+ Pre-preg Carbon Rear-wing Mainplane
- 1 Pair CFD-developed 3D EVO Pre-preg Carbon Endplates
- 1 Pair Swan-neck Wing Uprights
- 1 Pair Vehicle-specific Trunk Mounting Bases
- 1 Set Complete Installation Hardware
- 1 Set Mounting Base Template
Couldn't load pickup availability
WARRANTY POLICY
WARRANTY POLICY
Warranty & Inspection Policy
All products must be carefully inspected within seven (7) calendar days of delivery.
Any claim involving damage, defects, missing parts, or incorrect items must be submitted within this seven-day inspection period. Claims made more than seven days after delivery will not be eligible for warranty coverage, replacement, return, or refund.
Customers are responsible for inspecting the product and confirming that it is correct, complete, undamaged, and suitable for the intended vehicle before installation.
Products must not be installed if any damage, defect, fitment issue, or missing component is discovered. Please contact us before proceeding with installation.
Once a product has been installed on a vehicle, it is considered accepted by the customer and is no longer eligible for warranty coverage, return, replacement, or refund.
By purchasing and installing our products, the customer acknowledges and agrees to this Warranty & Inspection Policy.
GT4+ Rear Wing Overview
The RM Engineering GT4+ Carbon Fiber Rear Wing is a vehicle-specific, trunk-mounted aerodynamic system for the Toyota GR Supra A90 and A91. It features a 1600 mm pre-preg carbon fiber mainplane, swan-neck uprights and model-specific mounting bases.
Developed beyond the dimensional restrictions of the original Toyota GR Supra GT4 race car, the larger mainplane provides additional working area for track-day and Time Attack applications.
Swan-Neck Mounting
The swan-neck uprights support the mainplane from its upper surface, leaving the aerodynamically critical underside less obstructed. Vehicle-specific mounting bases and a supplied template position the assembly on the Supra’s rear hatch.
The mounting system was redesigned to reduce the water-intrusion risk associated with the original GT4-style installation. Careful sealing and professional installation are still required.
Base and EVO Configurations
Both versions use the same pre-preg carbon fiber mainplane, swan-neck uprights and vehicle-specific mounting system. The primary difference is the endplate design.
| Configuration | Endplate Design | Intended Use |
|---|---|---|
| Base | Conventional flat pre-preg carbon fiber endplates | Dual-purpose street and track builds |
| EVO | CFD-developed contoured 3D pre-preg carbon fiber endplates | Track-focused and Time Attack applications |
The Base configuration provides a cleaner, conventional GT-style arrangement. The EVO endplates are shaped to limit pressure equalization around the wingtip and preserve usable loading toward the outer sections of the mainplane.
The EVO version was developed to complement the Toyota GR Supra GT4+ RS Carbon Fiber Roof Fin as part of the complete rear aero configuration.
CFD-Analyzed Rear-Wing Performance
The GT4+ Rear Wing was evaluated within a full-vehicle Toyota GR Supra A90/A91 CFD study. The original simulation was solved at 100 km/h, with the results below normalized to 120 mph using the standard velocity-squared relationship and no additional performance multiplier.
The Base-to-EVO comparison was performed at a 0-degree geometric wing setting.
| CFD Result at 120 mph | Base | EVO |
|---|---|---|
| Integrated rear-wing downforce | 230.5 lbf | 248.6 lbf |
| Rear-wing drag | 33.0 lbf | 34.9 lbf |
| Aerodynamic L/D | 6.98 | 7.12 |
Within the evaluated complete-vehicle configurations, the EVO setup produced 7.9% greater integrated rear-wing load, 5.7% greater rear-wing drag and a 2.0% improvement in rear-wing aerodynamic efficiency.
The CFD fields show the EVO endplates managing wingtip airflow and preserving suction beneath the outer mainplane. The reported Base-to-EVO difference reflects the rear wing operating within the corresponding complete-vehicle configurations; the isolated contribution of the endplates was not separated from the Roof Fin and other package interactions.
Read the complete Toyota GR Supra GT4+ Base vs. EVO CFD analysis for the full methodology and reporting limitations.
Product Features
- Vehicle-specific Toyota GR Supra A90/A91 rear wing
- 1600 mm pre-preg carbon fiber mainplane
- Adjustable geometric wing position
- Swan-neck aluminum uprights
- Vehicle-specific trunk mounting bases
- Base flat or CFD-developed EVO endplates
- Mounting template and installation hardware included
- Professional installation required
Vehicle Fitment
Designed for:
- Toyota GR Supra A90
- Toyota GR Supra A91
This is a vehicle-specific trunk-mounted rear wing. Confirm the rear hatch condition, intended mounting locations and compatibility with any existing spoiler or rear body modification before ordering.
Browse the complete Toyota GR Supra A90/A91 aerodynamic collection.
Installation Requirements
Professional installation is required. The supplied template is used to position the vehicle-specific mounting bases before drilling the Supra’s rear hatch.
Test-fit the complete wing assembly and confirm the position and alignment of both mounting bases before drilling. All openings must be properly sealed during installation to reduce the risk of water intrusion.