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Porsche // 964 (911) (1989-1994) // 964 (911) TURBO 3.6L 1991-93
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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>>
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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 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Set of 2 brackets
Porsche 964
Porsche 944 S2 / Turbo ’87
Porsche 968
6082-T6 Aluminum, Helicoil inserts
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
SET OF 2
Fits:
Porsche 964 1989-94
Porsche 944 S2
Porsche 968 1992-95
For 964/944's with medium S4 calipers: Use 304x32mm rotors Porsche part number 92835104360 / 92835104460
For 964/944's with 993TT (Big Red Calipers): Use 322x32mm rotors Porsche part number 96535104500 / 96535104600
Note: Pictures may not show actual product. The adaptor is intended for off road use only.
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
SET OF 2
Fits:
Porsche 964 turbo
Porsche 964 RS
Kit Contains:
Brake Disc complete with centre bell.
Brake Disc Type: 2-Piece Slotted
The Girodisc system is a direct replacement for the OE disc. No modifications are necessary, and it allows the use of unmodified factory pads. The disc will bolt directly to the car and work with factory calipers.
The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in-house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.
The rotor and hat have a floating mount system, which utilizes 12 high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.
Once the Girodisc system is in place, simply replace the cast iron rotor when needed.
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.
A1-046
The product you are viewing cross references to these numbers
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- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
9m Carbon Ceramic Big Brake Kit – 350mm Front & Rear
Upgrade the braking performance of your Porsche 964 with the 9m Carbon Ceramic Big Brake Kit, designed to replace the original steel brake discs with advanced carbon ceramic technology.
This comprehensive upgrade features 350mm two-piece floating carbon ceramic discs front and rear, combined with uprated 9m/Brembo 6-piston front calipers and 4-piston rear calipers.
Engineered to deliver exceptional braking consistency, reduced weight and improved resistance to brake fade, the kit offers a substantial performance improvement over conventional cast iron braking systems.
The carbon ceramic discs are manufactured using long-strand carbon fibre reinforcement combined with silicon carbide, providing excellent strength, durability and thermal stability.
Each floating disc features a CNC-machined 6061-T6 billet aluminium centre bell, hard anodised for strength, rigidity and corrosion resistance.
The kit is supplied with adaptor brackets, braided brake lines and the required installation hardware.
What Does the 9m Carbon Ceramic Brake Kit Do?
The 9m braking system replaces the original Porsche 964 steel brake discs and calipers with a lightweight, high-performance carbon ceramic arrangement.
The larger 350mm discs and uprated multi-piston calipers provide increased braking capability, while the carbon ceramic construction offers excellent resistance to heat and brake fade.
Reducing brake disc weight also lowers unsprung and rotational mass, helping improve suspension response, handling and steering feel.
Why Upgrade to Carbon Ceramic Brakes?
Compared with conventional cast iron brake discs, carbon
ceramic technology offers several performance advantages:
- Weight reduction of approximately 16kg compared with the conventional cast iron disc arrangement
- Reduced unsprung mass for improved suspension response
- Excellent resistance to brake fade under demanding conditions
- Consistent braking performance at high operating temperatures
- Superior thermal stability during repeated heavy braking
- Significantly reduced brake dust with compatible brake pads
- Improved resistance to corrosion
- Exceptional durability and long potential service life
Under suitable operating conditions, carbon ceramic discs can achieve very high mileages, although actual service life depends on driving conditions, maintenance and usage.
Two-Piece Floating Carbon Ceramic Discs
The 9m kit uses 350mm floating carbon ceramic discs on both axles.
The friction rings are constructed from long-strand carbon fibre reinforced with silicon carbide, providing a lightweight structure capable of withstanding extreme braking temperatures.
The floating design allows controlled thermal expansion, helping reduce stress during repeated heating and cooling cycles.
Each disc features a precision CNC-machined 6061-T6 billet aluminium centre bell with a hard-anodised finish.
Uprated 9m/Brembo Brake Calipers
The kit includes uprated multi-piston calipers designed to
work with the larger carbon ceramic discs.
- Front: 6-piston calipers
- Rear: 4- calipers
Complete Brake Upgrade Kit
The 9m Carbon Ceramic Big Brake Kit includes:
- 350mm front carbon ceramic floating brake discs
- 350mm rear carbon ceramic floating brake discs
- CNC-machined 6061-T6 aluminium centre bells
- 9m/Brembo 6-piston front brake calipers
- 9m/Brembo 4-piston rear brake calipers
- Brake caliper adaptor brackets
- Braided brake lines
- Required installation hardware
Confirm the supplied brake pad specification and wheel clearance before installation.
Designed as a performance brake conversion for the Porsche 964 platform. Confirm compatibility with the individual model, existing braking system, wheel dimensions and ABS configuration before ordering.
Porsche 964 Carbon Ceramic Big Brake Kits & Performance Brake Upgrades
The 9m Carbon Ceramic Big Brake Kit provides a comprehensive braking upgrade for Porsche 964 owners seeking reduced weight, improved thermal stability and consistent braking performance.
Featuring 350mm carbon ceramic floating discs on both axles, uprated 9m/Brembo calipers and lightweight billet aluminium centre bells, the system offers significant advantages over traditional cast iron brake arrangements.
Its advanced carbon ceramic construction helps reduce unsprung mass, improve suspension response and maintain braking performance during repeated high-temperature use.
Supplied with adaptor brackets, braided brake lines and installation hardware, the kit is designed as a complete performance brake conversion for the Porsche 964.
Design911 supplies 9m Porsche performance brake kits, carbon ceramic brake discs, uprated calipers and associated braking components for classic and modern Porsche models.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9M964CCKIT
The product you are viewing cross references to these numbers