Girodisc Rear Steel Disc Upgrade – 380mm – Porsche 991 GT3 / GT3 RS (Steel Brakes)
Product Description
Rear Brake Upgrade for Track and Fast Road Performance
This Girodisc rear rotor kit is a direct replacement for the factory 380mm rear steel discs fitted to Porsche 991 GT3 and GT3 RS models with OEM red calipers. As a lightweight, 2-piece floating design, it significantly improves cooling efficiency, reduces unsprung weight, and enhances pedal response — especially under repeated high-temperature use on track.
Paired with the front Girodisc upgrade, this completes a fully balanced, high-performance braking setup designed to withstand the rigours of endurance racing and spirited road driving.
Why Upgrade to Girodisc?
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Lower unsprung mass for more agile suspension response
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Curved vane design promotes better cooling and thermal control
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Motorsport-level durability with reduced cracking under repeated heavy braking
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Designed for compatibility with popular pad compounds like Ferodo DS3.12, Endless ME20/22, or PFC 08/11
🔧 Designed specifically for 991 GT3 and GT3 RS models equipped with factory steel brakes (red calipers). Not suitable for PCCB (ceramic) equipped models.
Key Features
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2-piece floating steel disc (iron rotor) construction
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CNC-machined 6061-T6 aluminium bell, anodised for corrosion resistance
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380mm diameter – direct OEM replacement for factory rear steel brakes
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Directional curved vanes for effective heat management
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Fully made in the USA
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Works with OEM calipers and brake lines
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Ideal for high-performance road use, track days and endurance racing
Compatibility
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Porsche 991.1 GT3 (factory steel brakes only)
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Porsche 991.2 GT3 (factory steel brakes only)
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Porsche 991.1 GT3 RS (factory steel brakes only)
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Porsche 991.2 GT3 RS (factory steel brakes only)
⚠️ Not suitable for vehicles with PCCB carbon ceramic brakes (yellow calipers).
Matching Front Kit Available
We also offer the front 380mm Girodisc steel rotor upgrade for steel brake cars. For best results and braking balance, we strongly recommend replacing front and rear rotors together...
Girodisc Front Steel Disc Upgrade – 380mm – Porsche 991 GT3 / GT3 RS (Steel Brakes)
Recommended Supporting Upgrades
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Motorsport-grade brake pads (e.g. Ferodo DS3.12, Endless ME20/22, PFC 08/11)
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Braided brake lines
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High-temp brake fluid (Motul RBF 660, Endless RF-650)
Serviceability & Replacement
Once the Girodisc kit is installed, simply replace the disc/rotor when worn. New hardware is included with replacement discs, and the aluminium bells do not require replacement.
Sold/priced per pair.
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.
