Girodisc Porsche 986/987/996/997.1 Front Rotors
The Girodisc system is a direct replacement for the OE disc with the addition of the included caliper spacers and longer bolts. This upgrade increases the rotor diameter from 317mm to 340mm, improving braking force, cooling capacity, and pedal feel. It’s a true bolt-on upgrade that retains your factory calipers and ABS function while reducing unsprung and rotational mass for quicker suspension response and acceleration.
Lightweight, High-Performance 2-Piece Rotors
The central hat section is machined from U.S.-sourced 6061-T6 aircraft-grade aluminum, while the rotor rings are Girodisc’s proprietary high-carbon cast iron. Each component is made in the USA and machined in-house for precision fitment and consistency. The rotors feature a curved vane design that acts as a centrifugal pump, drawing cooling air through the disc during use for superior heat management on both street and track.
Girodisc A1-031 Features
- Upgrades OE 317mm discs to 340mm for greater thermal capacity and stopping power
- Floating mount system with 10 cadmium-plated steel drive pins for controlled float and quiet operation
- Reduces unsprung and rotational mass for sharper handling
- Fully serviceable—replace just the rotor rings when worn
- Includes caliper spacers and longer bolts for proper fitment
- Designed, cast, and machined in the USA
Vehicle Fitment
Works with factory calipers—no permanent modifications required. Includes caliper spacers and longer bolts.
- Porsche 986 Boxster (1997–2004, all non-Big-Red applications)
- Porsche 987 Boxster / Cayman (2005–2012, non-S)
- Porsche 996 Carrera (1999–2004, non-Turbo / non-GT)
- Porsche 997.1 Carrera (2005–2008, non-S)
Does not fit: 996/997 Turbo, GT3/GT2, PCCB/ceramic brake packages, or 997.2 models.
Technical Specifications
- Diameter: 340mm (OE 317mm)
- Vane Design: Curved, directional
- Hat Material: 6061-T6 aluminum, black anodized
- Ring Material: High-carbon cast iron
- Hardware: 10 floating drive pins with Class 12.9 fasteners
- Sold/Price: Per pair
Girodisc A1-031 FAQs
Do I need different brake pads? No. These rotors retain the factory caliper and pad shape—just choose your preferred compound for street or track use.
Will these make noise like race rotors? No. Girodisc’s spring washer hardware prevents the rattle commonly found in floating rotors while maintaining proper float for thermal expansion.
Are the rings replaceable? Yes. The design allows you to replace only the iron rings and reuse the aluminum hats, saving long-term cost.
Can I use these for track days? Absolutely. They’re engineered to handle repeated heat cycles without warping or cracking when paired with proper pads and fluid.
Upgrade your Porsche braking system with precision-engineered Girodisc rotors. Order today and experience improved stopping performance and reduced weight.
