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Porsche // Cayman 718C (982C) 2017>> // Cayman 718 2.0L Manual (300 Bhp)
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9m Floating Rear Brake Disc Upgrade – 350 x 20mm
Sold as a pair
Take the braking performance of your Porsche to the next
level with the Ninemeister 9m Floating Rear Brake Disc Upgrade. Featuring a 350 x 20mm two-piece floating slotted
brake disc assembly, this premium upgrade has been developed to deliver
exceptional braking consistency, superior cooling performance and reduced
unsprung weight for fast road and track-focused driving.
Fits:
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
Each assembly combines a lightweight CNC-machined aluminium hat with a precision-engineered high carbon cast iron rotor, creating a floating brake disc capable of expanding independently under extreme braking temperatures. This floating design helps minimise internal stress within the rotor, reducing the risk of distortion, vibration and brake judder while maintaining consistent pedal feel during repeated heavy braking.
Manufactured using CM-250 formulated high carbon alloy cast iron, the rotor delivers exceptional thermal stability, outstanding wear resistance and excellent braking performance under demanding conditions. Combined with 72 internal cooling vanes, heat is dissipated rapidly to minimise brake fade and maximise confidence behind the wheel.
Designed for enthusiasts who demand more from their Porsche, the Ninemeister 9m floating brake disc upgrade provides a significant improvement in braking performance without compromising everyday drivability.
What Are the Benefits of a Two-Piece Floating Brake Disc?
Unlike conventional one-piece brake discs, a two-piece floating assembly separates the braking surface from the mounting hat.
This advanced design offers numerous advantages:
- Allows the cast iron rotor to expand independently under heat.
- Reduces thermal stress within the braking surface.
- Minimises the likelihood of disc warping.
- Helps eliminate brake vibration and judder.
- Improves braking consistency.
- Reduces unsprung and rotating mass.
- Enhances suspension performance.
- Increases service life during demanding driving conditions.
This floating design is widely used in motorsport and high-performance road applications due to its ability to maintain braking performance under extreme temperatures.
Advanced Rotor Technology
The Ninemeister 9m rotor has been developed using premium materials and precision manufacturing processes.
Each rotor features:
- 72
internal cooling vanes for maximum airflow.
- CM-250
formulated high carbon alloy cast iron for exceptional strength and
thermal stability.
- Heat-treated rotor rings to relieve internal stresses.
- Reduced susceptibility to thermal distortion.
- Improved resistance to vibration.
- Precision-machined braking surfaces for consistent pad contact.
- Slotted road pattern to continuously clean the brake pad surface and assist with gas and dust evacuation.
The result is predictable braking performance with outstanding durability during repeated heavy braking.
Lightweight CNC Aluminium Hat Assemblies
Each floating disc incorporates a lightweight aluminium hat manufactured from 6061-T6 aerospace-grade aluminium.
Every hat is:
- CNC machined for exceptional accuracy.
- Hard anodised for corrosion protection.
- Lightweight to reduce rotating mass.
- Manufactured to precise tolerances.
- Engineered for reliable long-term performance.
The reduction in unsprung weight allows the suspension to react more efficiently, improving handling, ride quality and steering response.
Why Upgrade Your Rear Brake Discs?
High-performance driving generates significant braking temperatures that can challenge conventional brake discs.
Upgrading to the Ninemeister 9m floating brake discs offers:
- Improved heat dissipation.
- Reduced brake fade.
- More consistent braking performance.
- Reduced brake judder.
- Greater resistance to thermal cracking.
- Improved pedal feel. Lower unsprung weight.
- Enhanced confidence during spirited road driving and track use.
These advantages become particularly noticeable during repeated heavy braking where consistent performance is essential.
Benefits
- Superior braking consistency.
- Excellent thermal management.
- Increased resistance to brake fade.
- Reduced rotor distortion.
- Reduced brake vibration.
- Improved suspension response through lower unsprung weight.
- Outstanding durability.
- Perfect for fast road and occasional track use.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9M9812771820
The product you are viewing cross references to these numbers
- Porsche Boxster 981 S / GTS 3.4L 2012-16
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- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
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- Porsche Cayman 718 2.0L PDK (300 Bhp)
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Fits:
This is a 350mm Upgrade with spacers & hardware
Porsche 997.2 C2 / C4
Porsche 991.1 C2 / C4
Porsche 981 Boxster S
Porsche 981 Cayman S
Porsche 718 Cayman 2.0L
Porsche 718 Boxster 2.0L
Kit Contains:
Brake Disc 350MM complete with centre bell.
Brake Disc Type: 2-Piece Slotted
The Girodisc brake rotor is a direct replacement for the OE discs, and provides significant performance benefits. The rotors are compatible with any of the current pads typically used with these cars.
Additional information:
Braking Performance: The rotor is a two-piece design developed in racing to produce a lightweight rotor that can compensate for the different expansion rates between the hat and rotor and eliminate the possibility of rotor warping.
The rotor and hat have a floating mount system, which utilizes 10 high strength alloy steel drive pins, which allows for axial and radial float.
More heat sink without a weight penalty: The Girodisc disc set weights in a little lighter than the OE system but with an important advantage. The rotors have grown in diameter. This means that weight has been transferred from the center hat were it does nothing to the outer diameter where it is actively absorbing and dispersing heat.
High Quality Materials: The Girodisc system uses only the highest quality materials and components. The rotors are high carbon content iron for long wear and stable thermal performance. The top hat section is machined from billet aluminum with an attractive anodized finish.
This product is a special order item, allow 5 - 7 working days for delivery.
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
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Fits:
This is a 325mm Upgrade with spacers & hardware for the following cars
Porsche 981 Boxster / S
Porsche 981 Cayman / S
Porsche 718 Boxster / S
Porsche 718 Cayman / S
Kit Contains:
Brake Disc 325MM complete with centre bell.
Brake Disc Type: 2-Piece Slotted
The Girodisc brake rotor is a direct replacement for the OE discs, and provides significant performance benefits. The rotors are compatible with any of the current pads typically used with these cars.
Additional information:
Braking Performance: The rotor is a two-piece design developed in racing to produce a lightweight rotor that can compensate for the different expansion rates between the hat and rotor and eliminate the possibility of rotor warping.
The rotor and hat have a floating mount system, which utilizes 10 high strength alloy steel drive pins, which allows for axial and radial float.
More heat sink without a weight penalty: The Girodisc disc set weights in a little lighter than the OE system but with an important advantage. The rotors have grown in diameter. This means that weight has been transferred from the center hat were it does nothing to the outer diameter where it is actively absorbing and dispersing heat.
High Quality Materials: The Girodisc system uses only the highest quality materials and components. The rotors are high carbon content iron for long wear and stable thermal performance. The top hat section is machined from billet aluminum with an attractive anodized finish.
This product is a special order item, allow 5 - 7 working days for delivery.
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- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
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- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
Includes replacement hardware; the only parts you will reuse are your existing GiroDisc hats.
GiroDisc replacement rings are only designed to work with GiroDisc hats. They are not designed to be used with other brands, including hats from cars equipped with 2-piece rotors from the factory.
Fits:
Porsche 997.2 C2 / C4
Porsche 991.1 C2 / C4
Porsche 981 Boxster S
Porsche 981 Cayman S
Porsche 718 Cayman 2.0L
Porsche 718 Boxster 2.0L
NOTE: This listing is for replacement discs specifically designed for vehicles already equipped with GiroDisc's two-piece rotor system. Please note that this product cannot be used as a standalone upgrade.
This product is a special order item, allow 5 - 7 working days for delivery.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
D1-153S
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
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- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Includes replacement hardware; the only parts you will reuse are your existing GiroDisc hats.
GiroDisc replacement rings are only designed to work with GiroDisc hats. They are not designed to be used with other brands, including hats from cars equipped with 2-piece rotors from the factory.
Fits:
Porsche 981 Boxster / Boxster S
Porsche 981 Cayman / Cayman S
Porsche 718 Boxster / Boxster S
Porsche 718 Cayman / Cayman S
This product is a special order item, allow 5 - 7 working days for delivery.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
D2-035S
The product you are viewing cross references to these numbers