For an A90 Supra driven hard on the road or circuit, the brake package needs to manage repeated energy input as well as initial bite. These Pro-System axle kits combine Alcon caliper hardware with 380mm front or 355mm rear discs. Front and rear are offered as individual selections on this page, with anodized and nickel-plated configurations identified by their own vendor part numbers.

Alcon / Pro-System Toyota Supra A90 Brake System

The front caliper specification changes with finish: the anodized front kit uses CR6420 calipers, while the ENP front kit uses CAR8949Y55 calipers. The rear configurations specify the CAR4949AE06 family. Choose the axle and finish together so the order identifies the complete configuration.

Features

• 380mm front disc specification
• 355mm rear disc specification
• Front anodized: CR6420 calipers, BRK.200634
• Front nickel plated: CAR8949Y55 calipers, BRK.200636
• Rear anodized: CAR4949AE06 calipers, BRK.200635
• Rear nickel plated: CAR4949AE06 calipers, BRK.200637
• Individual front and rear axle kits; each selection orders one axle

Alcon Calipers and Finish Selection

Alcon calipers provide the pad support and hydraulic clamping function at the heart of each axle package. ENP denotes electroless nickel plating. Because the front caliper family differs between the anodized and plated kits, finish should not be treated as a cosmetic change when selecting service parts. Keep the kit part number with the vehicle’s service records so replacement pads and caliper components can be matched correctly.

Floating Two-Piece Rotors

Pro-System’s two-piece floating rotor design separates the iron friction ring from the aluminum mounting hat. Under repeated hard braking, the ring heats and expands much faster than the hub area. The floating attachment accommodates that growth instead of forcing the friction ring and hat to behave as a single rigid casting. It also provides a serviceable assembly: a worn ring can be replaced while a sound hat is retained.

Ventilation and Friction Surface

Braking converts the car’s kinetic energy into heat. The rotor must absorb that energy during the stop and release it between braking zones. Pro-System’s ventilated, slotted iron rotors combine internal cooling passages with a machined friction face. The vanes move air through the disc, while the slots help keep the pad contact surface clear. Rotor diameter, thickness, pad selection and cooling airflow all contribute to the system’s operating temperature.

Pro-System Rotor Preparation

Pro-System machines its iron rotors in Mooresville, North Carolina, using a specially formulated grey cast iron chosen for thermal stability and friction performance. Dyno bedding prepares the rotor friction surfaces under controlled conditions before installation. This preparation is part of the Pro-System approach to building a brake package, alongside precision-machined hats, dedicated brackets and floating rotor hardware. Pad inclusion and compound remain specific to the ordered kit.

Hats, Brackets and Serviceability

The rotor hat connects the friction ring to the hub; the caliper bracket locates the caliper relative to that ring. Their dimensions are application-specific, even when two kits use the same caliper family or rotor diameter. Keeping the correct combination matters for alignment, pad contact and clearance. Order replacement rings, hats, brackets and mounting hardware against the complete kit part number. Rotor bobbin components are supplied as complete hardware kits.

Wheel Fitment and Installation

The supplier lists these configurations for the 2019-on Supra A90 application. Confirm the exact vehicle and factory brake specification, then check wheel clearance for the selected front or rear kit. Wheel diameter alone does not establish clearance around the caliper or behind the spokes.

Replacement Parts

For replacement rotor rings, pads, calipers or mounting hardware, contact Alconkits with kit BRK.200634 / BRK.200636 / BRK.200635 / BRK.200637 and the axle being serviced. We will match the replacement to your exact configuration.

Gallery images show representative Pro-System component families. Application-specific components may differ.