Girodisc Porsche 390mm Rear Rotors
Upgrade your Porsche’s braking system with Girodisc’s 390mm rear iron rotors, designed as a direct replacement for OEM PCCB (carbon-ceramic) discs. This conversion provides improved heat capacity, consistent braking performance, and drastically lower maintenance costs—all while maintaining factory fitment and ABS compatibility.
Direct Iron Replacement for Porsche PCCB Rotors
The Girodisc system bolts directly to the car and works seamlessly with OEM calipers and pads. Each rotor features a CNC-machined 6061-T6 aluminum hat and Girodisc’s proprietary high-carbon cast iron friction rings, all made in the USA. The floating two-piece design allows for controlled expansion under heat, preserving pad contact and consistent pedal feel. The curved vane design acts as a centrifugal pump, pulling cooling air through the disc for maximum thermal efficiency during hard use.
Features
• Direct replacement for OEM Porsche PCCB 390mm rear rotors
• Billet 6061-T6 aluminum hats with hard-anodized finish
• Proprietary high-carbon cast iron rings cast and machined in the USA
• Floating mount system with 12 cadmium-plated steel drive pins
• Anti-noise spring washers eliminate rattle while maintaining float
• Curved internal vanes maximize airflow and cooling
• Fully rebuildable—replace only the iron rings when worn
• Sold/priced per pair
Girodisc A2-156 Rear Rotor FAQs:
Can these rotors replace Porsche PCCB carbon-ceramic discs directly? Yes. The Girodisc 390mm system is a direct bolt-on replacement designed to work with the original PCCB calipers and hardware.
What are the advantages of switching to iron rotors? Iron rotors provide more consistent performance at high temperatures, improved pedal feel, and drastically reduced replacement cost compared to OEM carbon-ceramics.
Do these rotors affect the car’s ABS or stability systems? No. Girodisc rotors maintain factory dimensions and mass distribution, ensuring full electronic compatibility.
How do they perform on track? Expect stable pedal feedback, greater resistance to fade, and predictable braking behavior throughout long sessions, especially when paired with performance pads and high-temperature fluid.
Experience superior control and serviceability with Girodisc’s 390mm rear iron rotors—built for Porsche performance enthusiasts who demand reliability, precision, and track-ready braking confidence.
