Girodisc Porsche 996 / 991 / 992 Rear Rotors (with Spacers & Bolts)
The Girodisc A2-032B Rear Rotor Kit is a premium direct-fit replacement for Porsche 996, 991, and 992 models. Engineered for high-performance driving, this system includes caliper spacers and longer bolts to accommodate the larger 350mm rotors. The result is improved braking torque, enhanced cooling efficiency, and reduced unsprung mass—all while retaining factory fitment and ABS calibration.
Lightweight Design & Increased Performance
Each Girodisc rotor assembly pairs a CNC-machined 6061-T6 aluminum hat with a proprietary cast iron disc. The 2-piece design significantly reduces rotational mass compared to OEM rotors, improving suspension response and acceleration. The curved vane design acts as a centrifugal pump, drawing air through the rotor to enhance cooling and resist fade under extreme braking conditions.
Precision Floating Mount System
The rotors feature Girodisc’s race-proven floating mount design with 10 cadmium-plated steel drive pins connecting the iron ring to the aluminum hat. These pins allow the disc to expand radially under high temperatures without warping, ensuring consistent pad contact. Anti-noise spring washers eliminate rattle, maintaining quiet operation suitable for street and track use alike.
Vehicle Fitment
- Porsche 996 Carrera / Carrera 4 / Carrera 4S
- Porsche 991 Carrera / Carrera 4 / Carrera GTS (Base models require S/4S/GTS rear pad shape for full rotor sweep)
- Porsche 992 Carrera / Carrera S / Carrera 4S
- Direct bolt-on installation with supplied spacers and hardware
Technical Specifications
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CMS Number: A2-032B
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Position: Rear
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Rotor Diameter: 350mm (includes caliper spacers & longer bolts)
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Design: 2-piece floating rotor assembly
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Material: Proprietary cast iron with 6061-T6 aluminum hat
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Vane Design: Curved directional vanes for improved airflow
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Hardware: Cadmium-plated steel drive pins, class 12.9 screws, anti-noise washers
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Rebuildable: Yes — replace rotor rings, reuse aluminum hats
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Sold/Price: Per pair
Girodisc A2-032B FAQs
Do these rotors fit all Porsche 996, 991, and 992 models? Yes. However, 991 base Carrera models must use the S/4S/GTS rear pad shape for full pad sweep.
What is included with this kit? Each kit includes two 350mm rotors, caliper spacers, and longer mounting bolts for a complete direct installation.
Are modifications required? No. The supplied hardware makes this a true bolt-on upgrade using factory calipers and lines.
What are the main benefits over stock rotors? Improved cooling, reduced weight, better pedal response, and replaceable rings for long-term cost savings.
Upgrade your Porsche’s braking system with the Girodisc A2-032B Rear Rotor Kit. Experience reduced fade, sharper braking response, and long-term durability whether on the street or at the track.
