Girodisc Front Steel Disc Upgrade – 380mm – Porsche 991 GT3 / GT3 RS (Steel Brakes)

Girodisc Front Steel Disc Upgrade – 380mm – Porsche 991 GT3 / GT3 RS (Steel Brakes)Upgrade Your Factory Steel Brakes for Peak Performance This Girodisc front steel disc upgrade kit is a direct replacement for the OEM 380mm single piece cast iron front discs fitted to factory steel brake Porsche 991 GT3 and GT3 RS models. Built for demanding track use and aggressive road driving, this 2 piece floating rotor setup enhances heat resistance, reduces unsprung mass, and improves pedal feel all while maintaining compatibility with the OEM

Upgrade Your Factory Steel Brakes for Peak Performance

This Girodisc front steel disc upgrade kit is a direct replacement for the OEM 380mm single-piece cast iron front discs fitted to factory steel brake Porsche 991 GT3 and GT3 RS models. Built for demanding track use and aggressive road driving, this 2-piece floating rotor setup enhances heat resistance, reduces unsprung mass, and improves pedal feel — all while maintaining compatibility with the OEM red calipers and brake lines.

Why Choose Girodisc?

The factory discs are good — but Girodisc takes it further with a purpose-built motorsport solution:

• Reduced unsprung weight for sharper handling and suspension response

• Directional curved vanes for efficient cooling under repeated hard braking

• Increased resistance to cracking and thermal stress

• Compatible with performance pads such as Ferodo DS3.12, Endless ME20/22, or PFC 08/11

🔧 Note: These rotors are designed for Porsche 991 GT3 / GT3 RS models that came with steel brakes (red calipers) from the factory. If your car has PCCB (carbon ceramic brakes with yellow calipers), you’ll need the larger 410mm Girodisc kit...

Girodisc Front Steel Disc Conversion – 410mm – Porsche 991 GT3 / GT3 RS / GT2 RS / 718 GT4 RS

Key Features

• 2-piece floating steel discs (iron rotors)

• CNC machined 6061-T6 aluminium hats, anodised for corrosion resistance

• 380mm diameter – direct OEM replacement for factory steel brakes

• Directional curved vane design for superior heat dissipation

• Fully machined in the USA

• Reuses OEM red calipers and brake lines

• Ideal for track, fast road, and endurance driving applications

Compatibility

• Porsche 991.1 GT3 (factory steel brakes only)

• Porsche 991.2 GT3 (factory steel brakes only)

• Porsche 991.1 GT3 RS (factory steel brakes only)

• Porsche 991.2 GT3 RS (factory steel brakes only)

⚠️ Not suitable for PCCB-equipped models (yellow calipers / carbon ceramic discs).

Rear Rotors Also Available

We also offer the matching rear Girodisc rotor upgrade for steel brake cars, sold separately for inventory tracking. For consistent performance and balance, we recommend replacing both front and rear discs together...

Girodisc Rear Steel Disc Upgrade – 380mm – Porsche 991 GT3 / GT3 RS (Steel Brakes)

Recommended Supporting Upgrades

• Performance brake pads (e.g. Ferodo DS3.12, Endless ME20/22, PFC 08/11)

• Stainless steel braided brake lines

• High-temperature brake fluid (e.g. Motul RBF 660, Endless RF-650)

Serviceability & Replacement

Once the Girodisc kit is installed, you’ll only need to replace the disc/rotor when worn. New hardware is included with replacement discs, and the aluminium bells do not require replacement.

Sold/priced per pair.