SKU: 86518264062

Girodisc Rear Steel Disc Conversion – 390mm – Porsche 991 GT3 / GT3 RS / GT2 RS / 718 GT4 RS

Sale price$885.13 Regular price$983.48
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Pay in installments of $245.87 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 23 - Jul 28

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Girodisc Rear Steel Disc Conversion – 390mm – Porsche 991 GT3 / GT3 RS / GT2 RS / 718 GT4 RSReplace 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

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:

  • Better thermal stability for track days and competition

  • Improved brake pedal feel and control

  • Reduced long-term maintenance costs

  • 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

  • 2-piece floating steel rotors

  • Lightweight, anodised 6061-T6 aluminium hats

  • Directional curved vane cooling for consistent performance

  • 390mm diameter – direct replacement for OEM PCCB rears

  • Fully CNC machined in the USA

  • Retains full compatibility with OEM yellow calipers and brake lines

  • Ideal for fast road use, endurance racing, and circuit driving

  • 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

  • Porsche 991.1 / 991.2 GT3

  • Porsche 991.1 / 991.2 GT3 RS

  • Porsche 991.2 GT2 RS

  • 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

  • High-friction pads (e.g. Ferodo, Endless, PFC)

  • Stainless steel brake lines

  • Motorsport brake fluid (e.g. Endless RF-650, Motul RBF 660)

  • Full Clubsport braking packages available on request

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 86518264062

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Marcus Scott
Dallas, US
★★★★★ 5
Best dog ball ever!
Pattern Name: 3 Large balls
We have a border collie and an Australian cattle dog. Both are obsessed with balls and love to play catch. They would destroy all tennis ball including ones for dogs within minutes. These have lasted over a year! They have some teeth marks but still work great! I have just bought a second set as they still tend to get lost from time to time.
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Reviewed in the United States on May 23, 2026
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Amazon Customer
Los Angeles, US
★★★★★ 5
These are worth the money!! BUY THEM!!
Pattern Name: 3 Large balls
These balls are amazing if you have a dog that likes to chew! We have 2 medium sized breeds that are heavy heavy chewers and they get so excited when we dig these out from under the couch or tv stand. Most "chew toys" have to find their way to the garbage within a few days. We've had these a little over 2 weeks now and they are holding up great. There are little teeth marks in them but no chunks ripped out and seem to be holding up great. They are a little squishy so I was worried they would get destroyed but nope. They are a little bigger than a tennis ball so I don't have to worry about them choking on them. JUST BUY THEM!!
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Reviewed in the United States on April 6, 2026
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Mare Bear
Houston, US
★★★★★ 5
Nice Ball
Pattern Name: 1 Large ball
Nice light, yet durable ball for my gs/pit mix. He's a year and a half and he plays hard. I really like this ball and I'd buy it again.
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Reviewed in the United States on May 7, 2026
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Amazon Customer
Carnegie, US
★★★★★ 4
Bounces great
Pattern Name: 3 Large balls
My dog is ball crazy and she loves this ball. It is durable and lightweight.
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Reviewed in the United States on May 19, 2026
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Shane C.
Carnegie, US
★★★★★ 5
Safe for your dogs teeth
Pattern Name: 4 Medium balls
These balls are fantastic. They are better for our dogs teeth. Traditional tennis balls have a material that will shave down dogs teeth after prolonged use. These are safe for their teeth. Bounce incredibly high. Which our Aussie loves and the bright colors make them easy to find in the yard: I highly recommend these!
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Reviewed in the United States on May 11, 2026

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