Bulkhead brace made from premium graphite material. Allows easy access to the engine screws, and gives 2 different flex characteristics to choose from to easily adapt the handling of the car to particular track conditions and tires used.
Graphite brace not used. This allows flex in the rear suspension and generates more rear traction. Recommended for low-traction tracks, or races with spec hard or large tires.
Graphite brace is connected to the 2-speed bulkheads. This setting reduces flex in the rear suspension and improves out-of-corner steering & rotation, but also slightly decreases rear traction. Recommended for medium- to high-traction tracks, or when tires with additive are used.