GiroDisc 2-Piece Front Rotors 2015-2020 Alfa Romeo 4C

The Alfa Romeo 4C is a light, mid-engine car with a carbon fiber tub, so every pound of unsprung weight you take off shows up in how it steers and rides. These Giro Disc 2-piece front rotors are a direct replacement for the factory front discs. No modifications are needed. They bolt to the car and work with the factory Brembo calipers, keeping brake bias and ABS behavior stock.

Construction

The center hat is machined from US-sourced 6061-T6 aircraft-grade aluminum. The ring is GiroDisc's own proprietary cast iron, poured in the USA and machined from start to finish in GiroDisc's shop. A curved vane design developed in racing works as a centrifugal pump, forcing cooling air through the disc to keep temperatures in check through long sessions. Lighter rotors also cut rotating and unsprung weight, which helps acceleration and suspension response.

Floating mount, quiet on the street

Ring and hat are joined by 10 high-strength alloy steel drive pins, made by GiroDisc in the USA and cadmium plated for long-lasting corrosion resistance. The pins carry the braking load while keeping axial and radial float between the hat and the ring. Class 12.9 cap screws with hardened washers secure them, and anti-noise spring washers on the rotor side let the ring grow with heat without the cold rattle typical of floating rotors. The float also lets the ring center itself between the pads. Once the system is on the car, you only replace the iron ring when it wears.

What's Included

Two assembled front rotors, one per side, each iron ring already mounted to its aluminum hat. Pads are not included.

Specifications

Fitment notes

Fits the 4C Coupe and 4C Spider with factory front brakes. The product photo is GiroDisc's representative image of its 2-piece rotors.

Fitment