Girodisc A1-209 Alfa Romeo Giulia & Stelvio Quadrifoglio Front Iron Rotors

Giulia Quadrifoglio and Stelvio Quadrifoglio models originally equipped with factory carbon ceramic brakes. This system replaces the OEM ceramic front rotors with a high-performance iron setup designed to deliver consistent braking performance, improved thermal stability, and significantly reduced replacement costs for aggressive street and track use.

To maintain optimal rotor weight and performance, this conversion requires brake pads with an annulus (pad swept area) of 66mm or less. Using a smaller pad annulus prevents excessive rotor mass while allowing access to a wide range of performance brake pad compounds. The required pad shape is extremely common and shared with vehicles such as the Nissan GT-R, Cadillac CTS-V, and many AMG Mercedes models equipped with 6-piston calipers. Once installed, only the cast iron rotor rings need to be replaced during service intervals. Sold and priced as a front pair.

Key Features

• Front iron rotor conversion for carbon ceramic–equipped Quadrifoglio models

• Direct replacement for OEM front ceramic rotors

• Requires brake pads with ≤66mm annulus for optimal rotor weight

• Common pad shape shared with GT-R, CTS-V, and AMG applications

• Two-piece floating design for improved heat control and durability

• Ideal for aggressive street driving and track use

Technical Specs

• Position: Front

• Rotor Type: Two-piece floating iron rotor conversion

• Hat Material: U.S.-sourced 6061-T6 aircraft-grade aluminum

• Rotor Material: Girodisc proprietary cast iron (USA poured & machined)

• Vane Design: Curved internal vanes for centrifugal air cooling

• Floating Hardware:

  • 12 high-strength alloy steel drive pins

  • Cadmium-plated for corrosion resistance

  • Class 12.9 cap screws with hardened washers

  • Anti-noise spring washers to prevent cold rattle

• Pad Requirement: ≤66mm annulus (common 6-piston pad shape)

• Serviceability: Replaceable cast iron rotor rings

• Sold As: Pair

Vehicle Fitment

• Alfa Romeo Giulia Quadrifoglio (2016–present) – with carbon ceramic brakes

• Alfa Romeo Stelvio Quadrifoglio (2016–present) – with carbon ceramic brakes