GiroDisc A1-308 2pc Front Rotors 360mm Mercedes AMG Multi-Fit 23.6lb Pair USA

Vehicle Fitment

• Mercedes-Benz AMG GT / GT S (C190, 2015-2021)
• Mercedes-Benz AMG GT Roadster (R190, 2016-2021)
• Mercedes-Benz AMG GT 43 / GT 50 / GT 53 (X290, 2018+)
• Mercedes-Benz C63 AMG (W204)
• Mercedes-Benz C63 AMG / C63 S AMG (W205)
• Mercedes-Benz CLK63 AMG Black Series
• Mercedes-Benz CLS55 AMG (C219 / W219, 2004-2006)
• Mercedes-Benz CLS63 AMG (C219 / W219, 2006-2010)
• Mercedes-Benz CLS63 AMG / CLS63 S AMG (C218, 2011-2017) - iron disc models only
• Mercedes-Benz CLS63 Shooting Brake AMG (X218, 2012-2018) - iron disc models only
• Mercedes-Benz E55 AMG (W211, 2003-2006)
• Mercedes-Benz E63 AMG (W211, 2006-2009)
• Mercedes-Benz E63 AMG (W212, 2009-2011) - iron disc models only
• Mercedes-Benz E550 (W212)
• Mercedes-Benz GLC43 AMG (X253, 2016+)
• Mercedes-Benz GLC63 AMG (X253, 2017+) - iron disc models only
• Mercedes-Benz S600 (W221, 2005-2013)
• Mercedes-Benz SL55 AMG (R230, 2002-2008)
• Mercedes-Benz SL63 AMG / SL65 AMG (R230)
• Mercedes-Benz SLK55 AMG (R172, 2012-2016)

Fitment Notes

• Direct bolt-on replacement for OEM 360mm front iron rotors - no modifications required; compatible with factory OEM front calipers
• Not compatible with models equipped with Mercedes-AMG ceramic composite (CCM) brakes - iron rotor models only where noted
• Maintains factory brake bias and ABS efficiency
• Sold as a pair (two front rotors)

Features

• Two-piece fully floating design separates the 6061-T6 aluminum hat from the cast iron disc ring - prevents thermal warping, reduces pad knockback, and allows the rotor to self-center between the pads
• GiroDisc proprietary high-carbon cast iron disc rings poured in the USA and machined entirely in-house at GiroDisc - same material specification used by professional racing organizations
• Curved directional vane design acts as a centrifugal pump during braking, forcing cooling air through the disc to improve heat dissipation and reduce fade under sustained loads
• 10 cadmium-plated high-strength alloy steel drive pins secured by class 12.9 cap screws with hardened washers - transfer braking torque while maintaining full axial and radial float between hat and disc
• Anti-noise spring washers allow the disc to expand freely under heat while eliminating cold-weather rattle associated with floating rotors
• Approximately 10.9 lbs lighter per rotor than OEM (23.6 lbs vs. 34.5 lbs stock) - significantly reduces unsprung and rotational mass for improved acceleration, steering response, and suspension dynamics
• Fully rebuildable - replace only the cast iron disc rings when worn; retain aluminum hats and hardware for multiple service cycles
• Made in the USA using domestically sourced materials

Specifications

• Part Number: A1-308
• Brand: GiroDisc
• Position: Front
• Rotor Type: Two-Piece Floating
• Diameter: 360mm
• Weight: 23.6 lbs per rotor (vs. 34.5 lbs OEM)
• Vane Design: Curved Directional Vanes
• Hat Material: 6061-T6 Aluminum (Black Anodized), USA-sourced
• Disc Material: GiroDisc Proprietary High-Carbon Cast Iron, USA-made
• Drive Pins: 10 High-Strength Alloy Steel, Cadmium-Plated (Class 12.9 hardware)
• Country of Origin: USA (domestically sourced materials)
• Sold As: Pair (2 front rotors)

Included Components

• 2x GiroDisc Two-Piece Floating Front Rotors (A1-308, 360mm)
• Drive pins, class 12.9 cap screws, hardened washers, and anti-noise spring washers pre-installed

Product Description

The GiroDisc A1-308 is a 360mm two-piece floating front rotor set covering one of the widest fitment ranges in GiroDisc's Mercedes-AMG lineup - spanning decades of AMG performance models from the W211 E55 AMG through the current C190 AMG GT platform. As a direct bolt-on replacement for the OEM 360mm front iron rotors, the A1-308 installs without modification and retains full factory caliper, brake bias, and ABS compatibility across all supported applications.

At 23.6 lbs per corner - versus 34.5 lbs for the OEM unit - the A1-308 reduces unsprung and rotational mass by approximately 10.9 lbs per rotor, delivering measurably improved acceleration response, lighter steering feel, and sharper suspension behavior on both street and track. GiroDisc's two-piece floating design allows the proprietary high-carbon cast iron disc ring to expand and contract thermally without transferring stress to the aluminum hat, virtually eliminating rotor warp and pad knockback. Curved directional vanes within the ring actively pump cooling air through the disc during braking for superior heat management under repeated hard stops. The rotors are fully rebuildable - when the disc rings eventually wear, only the rings are replaced, keeping long-term maintenance costs well below OEM replacement pricing. Made entirely in the USA from domestically sourced materials.