The 2013-2019 Porsche 911 (991 generation) models, including the GT3, Turbo, and GT3 Cup, are high-performance machines often equipped with Porsche Carbon Ceramic Composite Brakes (PCCB). While PCCB systems offer immense stopping power and low weight, the extreme heat generated during track sessions can lead to rotor oxidation and wear. Alcon provides high-performance replacement hats and rotors designed to maintain or exceed the braking standards of these specialized vehicles.
Contents
- Key Context
- Structured Analysis
- Practical Checklist
- CTA
- FAQ
- Source Notes
- Professional Disclaimer
Key Context
The 2013-2019 Porsche 911 range covers both the 991.1 and 991.2 generations. For these models, the PCCB system typically utilizes a 410mm front rotor and a 390mm rear rotor (specific to the GT3 and Turbo S trims). The GT3 Cup, being a dedicated racing platform, may utilize different configurations depending on the series regulations, but Alcon components are frequently used as the primary upgrade or replacement path for endurance racing.
Owners seeking Alcon replacements generally choose between two paths: direct carbon-ceramic replacements (Alcon CCX) or iron conversion kits. Both options require specific aluminum bell (hat) designs to accommodate the center-lock or five-lug hubs found on these 911 variants.
Structured Analysis
1. Replacement Rotor Types
Alcon offers two primary solutions for the 991 platform. The first is the CCX Carbon Ceramic system, which is a high-friction, lightweight ceramic disc designed to replace the OEM PCCB unit while utilizing Alcon’s proprietary disc material. The second is an iron replacement rotor kit, which allows owners to "downgrade" to iron for cost-effective track use while retaining high thermal capacity.
2. Hat Construction and Metallurgy
Alcon replacement hats for the 911 GT3 and Turbo are typically CNC-machined from high-grade aerospace aluminum. These hats are designed to handle the specific expansion rates of the rotor material—whether ceramic or iron. For the GT3 Cup, these hats are often engineered with different offsets to clear suspension components and provide the necessary cooling airflow required for sprint and endurance racing.
3. Dimensional Compatibility
For the 2013-2019 GT3 and Turbo models, replacement rotors must match the massive factory dimensions.
- Front Rotors: Typically 410mm x 36mm.
- Rear Rotors: Typically 390mm x 32mm.
Alcon kits are engineered to be "direct-fit," meaning they should interface with the factory calipers, though specific pad shapes may be required depending on whether the owner is using the factory PCCB caliper or an upgraded Alcon caliper kit.
4. Cost and Value Comparison
Replacement costs for high-performance rotors vary by distribution and hardware scope. For context, ForzaCCB provides direct-fit carbon ceramic rotor pairs at the following rates:
- GT Spec (380-405 mm): $2,100 per matched pair ($1,050 per rotor).
- Track Spec (410-440 mm): $2,350 per matched pair ($1,175 per rotor).
These prices are for the rotors alone. When purchasing through dealer networks or including custom-machined Alcon hats, prices can increase due to distribution markups and specialized hardware. An estimated delivery allowance (DDP) of $150/rotor is common for international shipping and taxes.
Practical Checklist
- Verify Chassis Version: Confirm if the vehicle is a 991.1 (2013-2016) or 991.2 (2017-2019), as some hardware offsets can vary.
- Identify Hub Type: Most GT3 and Turbo models use center-lock wheels, while some Turbo models may have 5-lug hubs. The hat must match the hub mounting exactly.
- Material Selection: Decide between Alcon CCX (Ceramic) for maximum weight savings or Alcon Iron for reduced consumable costs during frequent track days.
- Check Caliper Clearance: Ensure that the replacement rotor thickness and hat offset do not interfere with the factory yellow PCCB calipers.
- Pad Compatibility: Verify that the brake pad compound is compatible with the new rotor material; ceramic-specific pads should never be used on iron rotors and vice versa.
Recommended Next Step
Looking to plan the right brake package for Porsche owners comparing 911 GT3 and GT3 setups? Browse our Porsche Collection to compare vehicle-specific carbon ceramic rotor and upgrade options.
FAQ
Can I use Alcon iron rotors with my factory Porsche PCCB calipers?
Yes, Alcon offers iron conversion kits specifically designed to work with the factory calipers on the 991 GT3 and Turbo. However, you must change to an iron-compatible brake pad.
Is the GT3 Cup rotor different from the street GT3?
Yes. The 911 GT3 Cup is a race-spec vehicle and often uses different rotor thicknesses and hat offsets compared to the road-going GT3. Always verify the specific Alcon part number for the Cup variant.
Why should I replace the hats when replacing the rotors?
While Alcon rotors are often available as "rings" only, it is recommended to replace or professionally inspect the hats (bells) for stress cracks or distortion, especially if the vehicle has seen significant track time.
Do Alcon replacement rotors require coding?
If you are replacing PCCB with Alcon CCX ceramic rotors, no coding is typically required. If converting from ceramic to iron, some owners choose to recode the ABS/PSM system to the "iron brake" software map to optimize brake bias and pedal feel.
Explore fitment-focused options here: Porsche Collection.
Related reading for owners comparing similar setups: How to Measure Wear on Porsche Carbon Ceramic Brakes (PCCB): 996 GT2, 991, 992 GT3, and Turbo S.
Source Notes
- Source: https://alconkits.com/blogs/news/porsche-pccb-replacement-rotors
- Source: https://racingbrake.com/991-12-19-1/
Professional Disclaimer
All third-party trademarks, brand names, and model names are the property of their respective owners. References are for identification only and do not imply affiliation or endorsement.