GiroDisc A1-146 Porsche 991 GT3 Front 2-Piece Brake Discs
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GiroDisc A1-146 front 2-piece brake discs are for Porsche 991 GT3. Select them by the exact vehicle and brake setup below, including any required disc conversion, caliper spacing or pad shape.
Each assembly combines a reusable aluminium centre bell with a replaceable cast-iron friction ring. The floating mounting system allows movement between the bell and ring as temperatures change, while curved internal vanes carry cooling air through the disc. This construction also lets you renew worn rings without replacing serviceable centre bells.
Key Features
- Complete 2-piece floating disc assembly with aluminium centre bell and cast-iron ring
- Front axle application for the specified Porsche brake configurations
- Replaceable friction rings for future disc servicing
- Vehicle, caliper and pad requirements shown in the fitment table
- Supplied as a pair of complete discs
Vehicle Fitment and Brake Setup
| Vehicle | Axle | Model years | Required brake setup |
|---|---|---|---|
| Porsche 911 GT3/GT3 RS (991) | Front | without PCCB |
For cars with original centre-lock wheels, the correct centre-lock drive-pin configuration must be confirmed before ordering. Contact us with the car and wheel details so that this requirement is checked.
Product Specifications
| Part number | A1-146 |
| Brand | GiroDisc |
| Product type | 2-Piece Brake Discs |
| Axle | Front |
| Sold as | Pair of complete brake discs |
Recommended Supporting Upgrades
When the friction rings need renewing, use D1-066 replacement rings for the corresponding assembly and brake configuration.
For a complete axle-by-axle brake refresh, compare A2-146 rear discs. Check the brake option in each listing before combining parts.
Explore GiroDisc Porsche brakes and the complete GiroDisc range for supporting brake components.
Installation and Care
Install the left and right discs in the direction specified by GiroDisc. Follow the supplied fitting and bedding instructions, inspect pad-to-bell clearance and check the complete brake setup before use. Observe the minimum thickness marked on the disc and inspect the friction surfaces during routine brake servicing.
Contact us to confirm availability and lead time before ordering.
Product images may be illustrative. Use the part number and specifications to confirm the item required.
Product specifications
- Brand
- Girodisc
- Product type
- Brake Discs
- Part number / SKU
- A1-146
- Vehicle make
- Porsche
- Vehicle model
- 911
- Vehicle variant
- 991
Warranty: Products are supplied with the applicable manufacturer warranty.
Shipping: We offer UK and worldwide shipping. Delivery estimates are shown above.
Returns: Special-order items may be subject to different cancellation/return conditions.
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GiroDisc FAQs
Helpful answers before you order. Need more detail? Our team can help.
Which brake specification do I need?
Confirm the axle, fitted caliper and disc dimensions against the listing. Different factory brake packages can be fitted to the same model. If you are unsure, send us your vehicle details and photographs of the current brakes before ordering.
How do I choose between road and track options?
Tell us whether the car is used on the road, for occasional track days or for competition. Check the stated compound or product specification, and any usage restrictions in the listing. We can help you compare the available options for your intended use.
When will my order arrive?
Select your required option and check the live availability message above. Dispatch is when your order leaves us; delivery takes additional time and depends on the service and destination. If no verified lead time is shown, or you need the item for a fitting appointment or event, contact Nineteen72 Performance before ordering.
What is included in the price?
Check the product description, selected option and stated quantity before ordering. Images may show optional equipment or an example installation. If you need a matching pair, a complete kit or additional hardware, ask us to confirm exactly what is included.
How do I get help before ordering?
Contact Nineteen72 Performance with a link to this product and your question. For vehicle-specific parts, include your model, year, engine and any modifications that may affect compatibility.
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