Girodisc 380x34 Front Brake Discs for McLaren 540C & 570 GT (2016–2021) – MP4-12C (2011–2014) without CCB

The Girodisc A1-023 front brake discs, measuring 380 × 34 mm, improve thermal management during repeated braking on the McLaren 540C & 570 GT (2016–2021) and McLaren MP4-12C (2011–2014). Their cast-iron rotors and aluminum hubs form a floating assembly designed to manage thermal stresses and facilitate rotor replacement due to wear. Sold as a pair, including one left-hand rotor and one right-hand rotor.

These rotors are intended for the front axle of your McLaren 540C & 570 GT in the configuration shown below. They are compatible with the existing calipers; any required spacers and brake pad specifications must be observed.

The curved internal cooling fins channel air through the rotor to dissipate heat during repeated braking. The floating mounting minimizes stresses caused by thermal expansion differences between the brake pad and the rotor housing and helps the pad center itself between the brake pads, maintaining consistent contact under heat.

The hub is made of 6061-T6 aluminum. The high-strength steel drive pins are cadmium-plated to resist corrosion. They are secured by Class 12.9 bolts and hardened washers. Spring washers minimize cold-mounting noise while allowing the necessary compression for the floating mount.

New pads must be installed with new discs or tracks. Their shape and compound must be compatible with the mounting, the cast iron, and the intended use; adhere to the specific requirements for this part number and perform the prescribed break-in procedure.

Specifications for Girodisc A1-023 Rotors for McLaren 540C & 570 GT

• Brand: Girodisc
• PartNumber: A1-023
• Position: front
• Sizes (diameter × thickness): 380 × 34 mm
• Vehicles and models: McLaren 540C & 570 GT (2016–2021); McLaren MP4-12C (2011–2014)
• Braking surface material: high-resistance cast steel
• Packaging: Pair of complete rotors, one left and one right with disc bells.
• Housing: 6061-T6 aluminum
• Construction: two-piece floating mounting design
• Catalog part number: D1-023. Verify compatibility with the caliper generation before replacement.
• Internal ventilation: directional curved fins
• Minimum thickness: 32 mm
• Original rotor diameter: 370 mm
• Manufacturing of main components: United States

Vehicles compatible with Girodisc part number A1-023

• McLaren 540C & 570 GT (2016–2021)
• McLaren MP4-12C (2011–2014)

• McLaren 540C & 570 GT (2016–2021): Excludes carbon-ceramic; 380 mm front mounting with spacers and D1598-shaped rear brake pads.
• McLaren MP4-12C (2011–2014): Excludes carbon-ceramic brakes; 380 mm front mounting with spacers and D1598-shaped rear pads.

Each application is subject to its specific brake system, calipers, and any requirements for brake pads or spacers. Please verify these requirements before ordering.

Girodisc A1-023 Mounting Requirements

• McLaren 540C & 570 GT (2016–2021): Excludes carbon-ceramic; 380 mm front mounting with spacers and D1598-shaped rear brake pads.
• McLaren MP4-12C (2011–2014): Excludes carbon-ceramic brakes; 380 mm front mounting with spacers and D1598-shaped rear brake pads.

Brake Pads and Brake System for Your McLaren 540C & 570 GT

Choose brake pads whose shape is compatible with the calipers, track, and/or A1-023 rotors, and whose compound is suitable for sport driving or track use. The Endless, pagid Racing, or Ferodo Racing ranges may be considered after verifying the appropriate part number.

For intensive use, we recommend compatible aviation-grade flexible hoses and high-performance brake fluid that meets the vehicle’s specifications, along with proper bleeding and fluid replacement. This recommendation complements a mounting compatible with the original hydraulic system.

Maintenance of the Girodisc Mounting on Your McLaren 540C & 570 GT

Replacing the pads alone allows you to keep the controlled rotors in good condition. Reusing a rotor for up to three pad replacements is subject to inspection of its condition, its mounting components, and the mounting instructions; this number does not constitute a guaranteed service life. Use a new mounting component with each pad replacement.

FAQ — Girodisc A1-023 for McLaren 540C & 570 GT

What are the sizes of the A1-023 rotors for my McLaren 540C & 570 GT? The part shown measures 380 × 34 mm and is installed on the front axle. The diameter alone is not sufficient: also verify the brake system version and mounting requirements.

Is the product sold in pairs? Yes. It includes a left and a right disc for the same axle. Both discs come with their disc bells.

Do I need to replace the brake pads on my McLaren 540C & 570 GT?Yes. Always install new brake pads with new rotors or new brake pads. Their shape and compound must be compatible with the A1-023 rotor and/or braking surfaces and the calipers. Then break in the rotors and pads according to the prescribed procedures.

How do I identify the left and right sides? Girodisc rotors come with a label attached to each rotor: LEFT for the left side and RIGHT for the right side, as viewed in the direction of travel. On a left-hand-drive vehicle, “LEFT” corresponds to the driver’s side and “RIGHT” to the passenger side. Follow these labels and the instructions. On models with curved internal fins, the rolling direction depends on this internal ventilation; the surface grooves alone are not sufficient to determine the side.

How do I break in this mounting on my McLaren 540C & 570 GT? Follow the Girodisc procedure and the brake pad manufacturer’s instructions to build an even transfer ply. The PDF documents below detail installation and break-in.

PDF Documents for Mounting and Break-in

We’ve included two PDF documents below: one guide for installing and breaking in the rotors, and one guide for installing new tracks on existing rotors. Consult the document that applies to your specific task before you begin.

Key Features of Girodisc A1-023 Bowl Brake Discs

• 380 × 34 mm size for the front brakes of your McLaren 540C & 570 GT.
• 6061-T6 aluminum rotor and floating mount to manage thermal stresses.
• Internal ventilation via curved fins to dissipate heat.
• Replaceable pads to maintain a two-piece mounting.
• Left/right pair identified for mounting.
• Aluminum rotors help reduce unsprung and rotating mass compared to a comparable one-piece cast-iron disc.