Girodisc Rear Steel Disc Conversion – 390mm – Porsche 991 GT3 / GT3 RS / GT2 RS / 718 GT4 RS
Product Description
Replace Rear Carbon Ceramics Without Compromise
This Girodisc rear steel disc conversion kit — also referred to as iron rotors — is a direct-fit replacement for the factory 390mm PCCB (carbon ceramic) rear discs found on high-performance Porsche GT models. Whether you're saving your OEM ceramics for resale or want predictable, fade-free braking on track, this conversion delivers lasting performance and cost efficiency.
Sold/priced per pair.
Why Convert from PCCB to Steel Discs?
Ceramic discs are excellent for occasional fast road use, but steel rotors offer distinct advantages under more demanding conditions:
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Better thermal stability for track days and competition
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Improved brake pedal feel and control
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Reduced long-term maintenance costs
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Compatible with motorsport pad compounds like Ferodo DS3.12, Endless ME20/22, or PFC 08/11
🔧 Note: For optimal performance and brake balance, we strongly recommend converting front and rear discs together.
Key Features
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2-piece floating steel rotors
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Lightweight, anodised 6061-T6 aluminium hats
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Directional curved vane cooling for consistent performance
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390mm diameter – direct replacement for OEM PCCB rears
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Fully CNC machined in the USA
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Retains full compatibility with OEM yellow calipers and brake lines
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Ideal for fast road use, endurance racing, and circuit driving
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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.
Compatibility
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Porsche 991.1 / 991.2 GT3
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Porsche 991.1 / 991.2 GT3 RS
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Porsche 991.2 GT2 RS
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Porsche 718 Cayman GT4 RS
⚠️ Only suitable for vehicles originally equipped with PCCB rear brakes. Not compatible with models that came with steel brakes from the factory.
Front Conversion Also Available
This rear kit is designed to be used in conjunction with the matching 410mm Girodisc front conversion kit, available separately...
Girodisc Front Steel Disc Conversion – 410mm – Porsche 991 GT3 / GT3 RS / GT2 RS / 718 GT4 RS
Recommended Supporting Upgrades
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High-friction pads (e.g. Ferodo, Endless, PFC)
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Stainless steel brake lines
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Motorsport brake fluid (e.g. Endless RF-650, Motul RBF 660)
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Full Clubsport braking packages available on request
Shipping & Delivery
Dispatch Times
Most stocked items dispatch within 1–2 business days. Some products may have longer lead times due to special ordering, availability, or build times. If your order contains multiple items, they may be shipped together once all items are ready unless otherwise agreed.
UK & International Shipping
We ship worldwide. Transit times vary depending on destination and courier. Tracking details are provided once your order is dispatched.
Import Duties & International Orders
International customers are responsible for all import duties, taxes, and clearance fees. These are not included in our prices and are outside of our control. Refusal or non-payment of import charges may result in return shipping, handling fees, and customs charges being deducted from any refund.
Damaged Shipments
If your parcel arrives visibly damaged, please refuse delivery or note the damage with the courier. If damage is discovered after opening, contact us immediately with photos. Do not install damaged items, as installation voids courier claims and return eligibility.
Returns
Returns must be authorised before sending anything back. Returns must be requested within 14 days of delivery and returned within 14 days of approval, in unused/uninstalled condition and in original packaging. Some items, including special-order, built-to-order, used, installed, or modified parts, are non-returnable.
Full details are available in our Shipping Policy and Returns & Refund Policy.
Warranty & Disclaimer
Warranty
Most products include a manufacturer’s warranty covering manufacturing defects only. Warranties do not cover wear and tear, improper installation, misuse or neglect, track use, competition or racing environments, labour costs, vehicle damage, downtime, or consequential loss. Warranty outcomes are determined by the manufacturer, not Clubsport Garage. Items must be returned for inspection at the customer’s cost unless agreed otherwise.
Fitment & Installation
Many products are aftermarket components and may require professional installation or minor adjustment. Perfect OEM-level fitment cannot be guaranteed. Professional installation by an experienced workshop is strongly recommended. Installed or used items cannot be returned.
Motorsport Use Disclaimer
Some products are intended for off-road, track, or motorsport use only and may not be legal for road use, for example non-TÜV/DOT-approved parts. It is the customer’s responsibility to ensure compliance with local laws, insurance requirements, and vehicle regulations. By purchasing and installing aftermarket parts, you accept all responsibility for ensuring compatibility, legal compliance, proper installation, and any resulting wear, damage, or failure.
Product Images & Descriptions
Product photos are illustrative and may differ slightly from the item supplied. If specific details are important, please contact us before purchasing.
Full details are available in our Terms of Service and related policy pages.
