This GiroDisc two-piece brake rotor set is engineered for the exact brake configuration shown below. Its reusable aluminum hats and replaceable cast-iron friction rings reduce service waste while preserving the factory caliper relationship when the application notes are followed.
Key Features
- OEM Bolt-On Fit: 5x130mm bolt pattern 78.5mm height matches factory hubs calipers and hardware for plug-and-play installation.
- Two-Piece Construction: 6061-T6 aluminum hat bonds to high-carbon steel ring minimizing rotational inertia while allowing ring replacement if damaged.
- Slotted Surface: 144 slots per rotor expel brake gases dust and pad residue preventing glazing and maintaining consistent bite under high heat.
- Curved Vane Geometry: Internal vanes direct cooling air for 20 percent better heat transfer than straight vane OEM rotors reducing thermal throttling.
- Not compatible with vehicles equipped with Porsche Ceramic Composite Brakes (PCCB).
- No these are designed for steel brake equipped 991 GT3 GT3RS GT2RS models PCCB cars require different hub and caliper specs.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2014-2019 | Porsche | 911 | 991 GT3 or GT3 RS with factory iron brakes |
Specifications
| Brand | GiroDisc |
|---|---|
| Manufacturer Part Number | A1-146 |
| Product Type | Two-Piece Brake Rotor Set |
| Position | Front |
| Fitment Type | Vehicle specific |
What's Included
The axle set, assembled hats and friction rings, and only the hardware GiroDisc supplies for this exact part number
About GiroDisc
GiroDisc designs and manufactures serviceable two-piece brake rotors, replacement rings, and related brake components in Bellingham, Washington. Selection remains exact-part-number and brake-configuration specific.
Related GiroDisc Products
- GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Rear Rotors
- GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB)Slotted Rear Rings
- GiroDisc Porsche 911 Carrera (991.2) w/PCCB Front Caliper Rebuild Kit
Browse the GiroDisc collection for related brake components.
Frequently Asked Questions
Will this fit my 2014-2019 Porsche 911?
That year, make, and model range is listed, but the exact trim, axle position, rotor dimensions, caliper, brake package, and every application note must also match.
Can I use my factory calipers and brake pads?
Many GiroDisc rotor sets retain the factory calipers, but some iron conversions require a different pad shape or compound. Follow the exact application note for this part number.
Are these rotors sold individually or as a pair?
GiroDisc commonly sells these assemblies as an axle pair, but confirm the quantity shown for this exact part number before ordering.
Installation Instructions
Follow the current GiroDisc instructions and vehicle service information. Confirm the brake package and rotor direction, clean mounting surfaces, inspect hubs and calipers, torque all fasteners to the specified values, verify clearance, and complete the required pad-bedding procedure before normal use.
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