Girodisc 360x36 Front Brake Discs for Mercedes AMG GT (2017+) - AMG GT53 (2002-2022) - C63 (W204) (2008-2015) - C63 (W205) (2015

Girodisc A1-308 front brake discs, measuring 360 × 36 mm, enhance braking endurance during sustained use on the Mercedes-AMG GT (2017+), Mercedes-AMG GT53 (2002–2022), Mercedes C63 (W204) (2008–2015), Mercedes C63 (W205) (2015+), Mercedes CLK63 Black Series (C209) (2008), Mercedes CLS55 (W219) without the P30 package (2006), Mercedes CLS63 (W218) (2012–2018), Mercedes CLS63 (W219) without P30 package (2007–2011), Mercedes E55 (W211) (2003–2006), Mercedes E550 (W212) (2012–2014), Mercedes E63 (W211) (2007–2009), Mercedes E63 (W212) (2010–2016), Mercedes SL55 (R230) without P30 package (2003–2008), Mercedes SL63 (R230) without P30 package (2009–2012), Mercedes SLK55 (R172) (2012–2016). Their cast-iron rotors and aluminum hubs form a floating assembly designed to handle thermal stresses and facilitate rotor replacement due to wear. Sold in pairs, with one left-hand rotor and one right-hand rotor.

These rotors are intended for the front axle of compatible vehicles in the configuration listed below. They retain the compatible caliper mounting; 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 limits stresses caused by thermal expansion differences between the rotor and the housing and helps the rotor 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; comply with the specific requirements for this part number and perform the prescribed break-in procedure.

Specifications for Girodisc A1-308 rotors for compatible vehicles

• Brand: Girodisc
• PartNumber: A1-308
• Position: front
• Sizes (diameter × thickness): 360 × 36 mm
• Vehicles and models: Mercedes AMG GT (2017+); Mercedes AMG GT53 (2002–2022); Mercedes C63 (W204) (2008–2015); Mercedes C63 (W205) (2015+); Mercedes CLK63 Black Series (C209) (2008); Mercedes CLS55 (W219) without P30 package (2006); Mercedes CLS63 (W218) (2012–2018); Mercedes CLS63 (W219) without P30 package (2007–2011); Mercedes E55 (W211) (2003–2006); Mercedes E550 (W212) (2012–2014); Mercedes E63 (W211) (2007–2009); Mercedes E63 (W212) (2010–2016); Mercedes SL55 (R230) without the P30 package (2003–2008); Mercedes SL63 (R230) without the P30 package (2009–2012); Mercedes SLK55 (R172) (2012–2016)
• Braking surface: 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: D1-308. Verify compatibility with the caliper generation before replacement.
• Internal ventilation: directional curved fins
• Minimum thickness: 34 mm
• Overall height: 65 mm
• Original rotor diameter: 360 mm
• Weight / weight reduction: Comparison stated in the manufacturer’s specifications: approximately 10.7 kg per disc versus 15.65 kg for the original, for a weight savings of 4.94 kg per disc (9.89 kg per pair).
• Manufacturing of main components: United States

Vehicles compatible with Girodisc part number A1-308

• Mercedes AMG GT (2017+)
• Mercedes AMG GT53 (2002–2022)
• Mercedes C63 (W204) (2008–2015)
• Mercedes C63 (W205) (2015+)
• Mercedes CLK63 Black Series (C209) (2008)
• Mercedes CLS55 (W219) without P30 package (2006)
• Mercedes CLS63 (W218) (2012–2018)
• Mercedes CLS63 (W219) without P30 package (2007–2011)
• Mercedes E55 (W211) (2003–2006)
• Mercedes E550 (W212) (2012–2014)
• Mercedes E63 (W211) (2007–2009)
• Mercedes E63 (W212) (2010–2016)
• Mercedes SL55 (R230) without P30 package (2003–2008)
• Mercedes SL63 (R230) without P30 package (2009–2012)
• Mercedes SLK55 (R172) (2012–2016)

• Mercedes AMG GT (2017+): Base model.
• Mercedes-AMG GT53 (2002–2022): Type X290.
• Mercedes CLS55 (W219) without P30 package (2006): Without P30 package.
• Mercedes CLS63 (W218) (2012–2018): Excludes carbon-ceramic brakes.
• Mercedes CLS63 (W219) without P30 package (2007–2011): Without P30 package.
• Mercedes E63 (W212) (2010–2016): Excludes carbon-ceramic brakes.
• Mercedes SL55 (R230) without the P30 package (2003–2008): Without the P30 package.
• Mercedes SL63 (R230) without P30 package (2009–2012): Without P30 package.

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 A1-308 Mounting Requirements

• Mercedes AMG GT (2017+): Base model.
• Mercedes AMG GT53 (2002–2022): Type X290.
• Mercedes CLS55 (W219) without P30 package (2006): Without P30 package.
• Mercedes CLS63 (W218) (2012–2018): Excludes carbon-ceramic brakes.
• Mercedes CLS63 (W219) without P30 package (2007–2011): Without P30 package.
• Mercedes E63 (W212) (2010–2016): Excludes carbon-ceramic brakes.
• Mercedes SL55 (R230) without the P30 package (2003–2008): Without the P30 package.
• Mercedes SL63 (R230) without P30 package (2009–2012): Without P30 package.

Brake pads and braking systems for compatible vehicles

Choose brake pads whose shape is compatible with the calipers, track, and/or A1-308 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 the mounting, which is compatible with the original hydraulic system.

Maintenance of the Girodisc mounting on compatible vehicles

Replacing the pads alone helps keep the 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 each time you replace the pads.

FAQ — Girodisc A1-308 for compatible vehicles

What are the sizes of the A1-308 discs for my vehicle? The part number shown measures 360 × 36 mm and is mounted on the front axle. The diameter alone is not sufficient: also check the brake system type 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 vehicle?Yes. Always install new brake pads with new rotors or new braking surfaces. Their shape and compound must be compatible with the A1-308 track 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 from 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 vehicle? Follow the Girodisc procedure and the brake pad manufacturer’s instructions to build up an even transfer ply. The PDF documents below detail installation and break-in.

PDF Documents for Mounting and Break-in

We have included two PDF documents below: an instruction manual for installing and breaking in the discs, and an instruction manual for installing new tracks on existing bowls. Consult the document that applies to your specific task before you begin.

Key Features of the Girodisc A1-308

• 360 × 36 mm size for front braking on compatible vehicles.
• 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.