SPORTS Brake Disc

Zimmermann Black Coat Z Brake disc rotor - Front

Internally Vented, Slotted
Surface: Coated
Outer diameter: 330mm
Brake Disc Thickness: 34mm
Bolt Hole Circle Ø: 130mm
Centering Diameter: 98mm
Weight: 10.5kg
Hole Pitch / Number: 7/5


Porsche 996 turbo - 2001 to 2005
Porsche 996 C4S - 2001 to 2005
Porsche 997 C4S - 2005 to 2008
Porsche 997 C2S - 2005 to 2008
Porsche 997 MKII C4S - 2009 to 2012
Porsche 997 MKII C2S - 2009 to 2012
Porsche 991.2 C2 / C4 - 2016 to 2019
Porsche 991.2 C2S / C4S - 2016 to 2019
Porsche 992.1 C2 / C4 - 2019 to 2024
Porsche 718 Boxster S / GTS 2.5ltr - 2017 Onwards
Porsche 718 Cayman S / GTS 2.5ltr - 2017 Onwards

The Zimmermann Black:Z brake disc was developed by combining expertise from production brake discs with insights gained through motorsport, particularly in the VLN racing series. Featuring a unique groove pattern protected by a utility model, the Black:Z offers an optimal alternative to the perforated Sport:Z disc.

Engineered to deliver the high braking performance demanded in racing, this disc also excels in everyday road use. Like all Zimmermann products, it is manufactured exclusively from premium-quality cast materials.

The result speaks for itself, with the VLN racing team praising its performance: “The disc is amazing!”

Approved for both road and track use, the Zimmermann Black:Z is a versatile, high-performance solution for discerning drivers.

Your advantages: 

• Faster brake response due to optimized water drainage
• Better wet braking performance
• Utility model protected groove pattern ensures optimal heat dissipation and thus improved braking performance
• Brake fading is avoided
• Cooler look Better appearance thanks to anti-corrosion coating Coat Z+
• Better grip and faster brake response through constant sharpening of the pads
• Replacement of the original disc 1:1 possible
• ECE R90 approved

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9963514

The product you are viewing cross references to these numbers

9m Floating Front Brake Disc Upgrade – 350 x 34mm 
Sold as a pair

Take the braking performance to the next level with the 9m Floating Front Brake Disc Upgrade, engineered for drivers who demand exceptional stopping power, improved heat management and long-term durability. Designed as a premium replacement for the factory front brake discs, this two-piece floating slotted brake disc assembly combines advanced materials with precision engineering to deliver consistent braking performance on both road and track.

Fits:

• Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Cayman S 718 2.5L Manual (350 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)

Each assembly consists of a CNC-machined aluminium hat paired with a high-carbon alloy cast iron floating rotor ring, reducing unsprung weight while allowing the braking surface to expand and contract naturally under extreme temperatures. This floating design helps minimise stress, reduces the risk of disc distortion and maintains a more consistent pedal feel during repeated heavy braking.

Manufactured using CM-250 formulated high-carbon alloy cast iron, the rotor rings are heat treated to relieve internal stresses before machining, improving strength, stability and resistance to cracking or vibration. Combined with 72 precision-engineered internal cooling vanes, these discs deliver outstanding thermal efficiency, allowing heat to dissipate rapidly and helping maintain braking performance under sustained high-load conditions.

The result is a brake disc package that offers exceptional reliability, improved driver confidence and the performance expected from a Porsche developed for enthusiastic road driving and occasional circuit use.

What Does a Two-Piece Floating Brake Disc Do?

A floating brake disc separates the braking surface from the mounting hat, allowing each component to perform its specific function more efficiently.

Key advantages include:

• Allows the rotor ring to expand independently during heavy braking.
• Reduces thermal stress transferred into the hub assembly.
• Minimises the risk of brake judder and disc distortion.
• Improves heat dissipation.
• Reduces unsprung weight.
• Delivers more consistent pedal feel.
• Enhances braking performance during repeated high-speed stops.

Compared with conventional one-piece brake discs, floating assemblies provide improved thermal management and greater durability under demanding driving conditions.

Why Upgrade to the 9m Floating Brake Disc Assembly?

The 9m floating brake disc upgrade has been developed using premium materials and precision manufacturing processes to maximise braking efficiency.

Benefits include:

• Two-piece floating brake disc design.
• Slotted braking surface for improved pad cleaning and gas evacuation.
• 72 internal cooling vanes for exceptional airflow.
• CM-250 formulated high-carbon cast iron rotor rings.
• Heat-treated rotors to reduce internal stresses.
• CNC-machined 6061-T6 aluminium hats.
• Hard anodised hat assemblies for corrosion resistance.
• Reduced unsprung weight.
• Improved resistance to thermal distortion.
• Consistent braking performance under repeated heavy use.
• Ideal for spirited road driving, fast road builds and track days.

Premium Engineering

Every component has been carefully engineered to deliver exceptional durability and performance.

Rotor Rings

The rotor rings are manufactured from CM-250 high-carbon alloy cast iron, providing:

• Outstanding high-temperature strength.
• Excellent wear resistance.
• Improved thermal stability.
• Enhanced braking consistency.
• Long service life.

Following casting, each rotor is heat treated to relieve internal stress, helping prevent deformation and vibration throughout its operating life.

Aluminium Hat Assemblies

The centre hats are precision CNC machined from 6061-T6 aluminium before receiving a durable hard anodised finish.

Benefits include:

• Lightweight construction.
• Excellent dimensional accuracy.
• Corrosion resistance.
• Reduced unsprung mass.
• High structural rigidity.

Slotted Brake Disc Design

The precision-machined slots help maintain optimum braking performance by:

• Clearing brake dust from the pad surface.
• Allowing gases generated under heavy braking to escape.
• Maintaining consistent pad contact.
• Improving wet-weather braking response.
• Enhancing pedal consistency.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9M71825GTS

The product you are viewing cross references to these numbers