GiroDisc A1-216 2-Piece Slotted Front Rotors for 2018-2025 Audi RS4/RS5 B9

Vehicle Fitment

• 2018-present Audi RS4 (B9)
• 2018-present Audi RS5 (B9, all body styles: Coupe, Sportback, etc.)

Features

• 2-piece floating rotor design - forged aluminum hat (6061-T6) + cast-iron rotor ring to reduce unsprung & rotational mass
• Slotted and vented rotor surface for improved pad bite, gas/debris purge, and heat dissipation under heavy braking
• Racing-inspired curved-vane internal ventilation - acts as a centrifugal air-pump to pull cooling air through the disc during hard braking or repeated stops
• Floating-mount hardware: high-strength alloy steel drive pins, cadmium-plated for corrosion resistance, secured with high-grade cap screws & anti-noise spring washers for quiet operation
• Direct bolt-on replacement - fits OEM calipers and hubs, no adapters or modifications required
• Reduced rotating & unsprung mass compared to stock - improves suspension response, steering feel, and braking modulation
• Disc-ring is serviceable: when worn or warped you can replace only the rotor ring (with part D1-216) instead of entire rotor/hats - lowers long-term maintenance cost
• Maintains original brake bias and ABS function when used with compatible OEM or aftermarket pads

Specifications

• Part Number: A1-216
• Rotor Type: 2-piece floating, slotted & vented front rotors (sold as pair)
• Hat Material: 6061-T6 aircraft-grade aluminum
• Rotor Ring Material: Proprietary high-carbon cast iron (machined in-house)
• Mounting: Floating-mount with alloy drive pins + anti-noise spring washer system
• Sold As: Pair (front left + right) including all floating-mount hardware
• Brake Compatibility: Works with OEM calipers (stock RS4/RS5 B9 brake setup) - requires pads with appropriate swept-area for rotor ring width

Included Components

• 2x Front brake rotors (left & right), 2-piece floating design (slotted & vented)
• Floating-mount hardware (drive pins, anti-noise spring washers, cap screws / bolts)

Product Description

The GiroDisc A1-216 rotor set is a true high-performance upgrade for 2018-on Audi RS4 and RS5 (B9), offering substantial improvements over the stock one-piece rotors in terms of weight, cooling, and braking consistency. By combining a lightweight 6061-T6 aluminum hat with a durable, high-carbon cast-iron rotor ring, A1-216 reduces unsprung and rotating mass - which translates to sharper suspension response, more precise steering feel, and improved braking modulation under both street and track conditions.

The slotted and vented disc surface, together with GiroDisc's curved-vane internal ventilation, ensures efficient heat dissipation and pad-gas/debris purge - reducing brake fade and maintaining consistent performance during spirited driving or repeated heavy braking. The floating-mount design with anti-noise hardware allows the rotor to thermally expand without warping, while also eliminating cold-start rattles common to some two-piece designs. Because installation is direct-bolt with OEM calipers and hubs, A1-216 preserves brake bias, ABS response, and overall brake system integrity - making it a practical, high-performance, and maintainable brake upgrade for RS4/RS5 owners.