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Porsche > Boxster 718 (982) 2017>> > Boxster Spyder 718 4.0L (420 Bhp) > Brakes >

SPORTS Brake Disc

SPORTS Brake Disc

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DISPLAYING 1 to 6 (of 6 products)
Floating brake disc and pad kit FRONT. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder - 98135140581, 98135140681, 98135140580, 98135140680, 99135140581, 99135140681, 99135194782, 99135194783, 99135194784, 9GT698151G, 99135194781 - 9M9GT615301N, 9M99135194784
6
Floating brake disc and pad kit FRONT. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder
9M9GT615301NKIT
Product Information
Product Information
Floating brake disc and pad set - Slotted. 
Sold as a front axle set

Fits:

Porsche 991 GT3 / GT3 RS - 2014 to 2021
Porsche 981 Cayman GT4 - 2015 to 2016
Porsche 718 Cayman GT4 - 2019 Onwards
Porsche 718 Spyder - 2019 Onwards

9m floating front brake disc replacement set.
Not suitable as PCCB conversion

Disc size : 380 x 34 mm
Direct replacement for steel assemblies with 380mm front discs

Hat and Floating disc assembly kit with slotted road brake discs (Left and Right)
Two-piece floating slotted  front iron disc upgrade (including centre lock wheels)

  • Rotors come with 72 cooling vanes for optimal cooling.
  • Assemblies made of CM-250  formulated high carbon alloy cast iron, it allows for high-temperature strength and durability.
  • Hat assemblies are CNC machined from 7075 T6 material then hard anodised.
  • Rotor rings are heat treated to release stress in the rotor to avoid deformation and vibration.

9m fast road/track brake pads feature very good modulation and release characteristics. They have a low metallic resin bonded material containing steel and aramid fibers so the friction level of the material maintains constant at a low-medium level.

High brake coefficient of friction 0.55
With higher stopping power and maximum effective operating temperature, the 9M compound is ideal for advanced high speed track events, competitions and heavier cars that require maximum braking performance.
  • Good modulation and release characteristics
  • Excellent pad and rotor life
  • High fade resistance compound, with solid pedal feel throughout the effective temperature range  




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Related, superseded, cross reference or alternative numbers for comparison.

9M9GT615301NKIT
98135140581
98135140681
98135140580
98135140680
99135140581
99135140681
99135194782
99135194783
99135194784
9GT698151G
99135194781

The product you are viewing cross references to these numbers
Floating brake disc and pad set slotted REAR. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder - 99135240780, 99135240880, 98135240780, 98135240880, 98135240781, 98135240881, 98135294880, 98135294882, 9GT698451G, 99135294880, 99135294881, 99135294883 - 9GT615601N, 9M9GT698451
7
Floating brake disc and pad set slotted REAR. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder
9GT615601NKIT
Product Information
Product Information
Floating brake disc and pad set, Rear - Slotted. 
Sold as a rear axle set

Fits:

Porsche 991 GT3 / GT3 RS - 2014 to 2021
Porsche 981 Cayman GT4 - 2015 to 2016
Porsche 718 Cayman GT4 - 2019 Onwards
Porsche 718 Spyder - 2019 Onwards

9m floating rear brake disc and pad replacement set 
Not suitable as PCCB conversion 

Disc size : 380 x 30mm
Direct replacement for steel assemblies with 380mm rear discs

Hat and Floating disc assembly kit with slotted road brake discs (Left and Right)
Two-piece floating slotted  front iron disc upgrade (including centre lock wheels)

  • Rotors come with 48 cooling vanes for optimal cooling.
  • Assemblies made of CM-250  formulated high carbon alloy cast iron, it allows for high-temperature strength and durability.
  • Hat assemblies are CNC machined from 7075 T6 material then hard anodised.
  • Rotor rings are heat treated to release stress in the rotor to avoid deformation and vibration.

9m fast road/track brake pads feature very good modulation and release characteristics. They have a low metallic resin bonded material containing steel and aramid fibers so the friction level of the material maintains constant at a low-medium level.

High brake coefficient of friction 0.55
With higher stopping power and maximum effective operating temperature, the 9M compound is ideal for advanced high speed track events, competitions and heavier cars that require maximum braking performance.
  • Good modulation and release characteristics
  • Excellent pad and rotor life
  • High fade resistance compound, with solid pedal feel throughout the effective temperature range  


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

9GT615601NKIT
99135240780
99135240880
98135240780
98135240880
98135240781
98135240881
98135294880
98135294882
9GT698451G
99135294880
99135294881
99135294883

The product you are viewing cross references to these numbers
Brake disc rotor, Front. FORMULA Z. Porsche 981 Boxster 2.7L / 981C Cayman 2.7L (OE Part No 98135140101/98135140201) - 98135140580, 98135140581, 98135140680, 98135140681, 9GT615301N, 9GT615302N - 460.4535.70, 460.4534.70
3
Brake disc rotor, Front. FORMULA Z. Porsche 981 Boxster 2.7L / 981C Cayman 2.7L (OE Part No 98135140101/98135140201)
98135140
Product Information
Product Information
Zimmermann FORMULA Z brake disc.

Vented, Perforated, Two-piece floating brake disc, Coated
Outer diameter: 380 mm
Brake Disc Thickness: 34 mm

front
Not for cars with ceramic brake (PCCB)
Porsche 982SP Boxster Spyder 2019>> - FRONT
Porsche 981 Cayman GT4 2016 - FRONT
Porsche 982 Cayman GT4 2019>> - FRONT

The Zimmermann Formula Z brake disc was designed with the aim of teaming simple installation with optimum braking effect under high mechanical and thermal load.
The compound brake disc developed by Zimmermann accommodates the increased demands incurred by engine tuning and optimised chassis structures.

Your advantages:
• Excellent deceleration action and no distortion of friction ring at high temperatures
• Substantial weight saving and therefore less unsprung mass
• Floating mounting enables radial expansion of the brake disc under relatively heavy loads, thus preventing shielding and increasing resistance to heat cracks
• „Hot spots" prevented by optimised design of ventilation channels
• 1:1 exchange of original disc possible
• Not subject to registration: general ABE certification supplied with disc
• No conversion required for brake tuning

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

98135140
98135140580
98135140581
98135140680
98135140681
9GT615301N
9GT615302N

The product you are viewing cross references to these numbers
Brake disc rotor, Rear. FORMULA Z. Porsche 982 Boxster Spyder / 982 Cayman GT4 (OE 98135240781 / 98135240881) - 460.4537.70, 460.4536.70, 98135240780, 98135240781, 99135240700, 99135240703, 98135240880, 98135240881, 99135240800, 99135240803, 9GT615601F, 9GT615602F
5
Brake disc rotor, Rear. FORMULA Z. Porsche 982 Boxster Spyder / 982 Cayman GT4 (OE 98135240781 / 98135240881)
9GT61560
Product Information
Product Information
Zimmermann FORMULA Z brake disc.

Vented, Perforated, Two-piece floating brake disc, Coated
Outer diameter: 380 mm
Brake Disc Thickness: 30 mm

rear
Not for cars with ceramic brake (PCCB)
Porsche 982SP (718) Boxster Spyder 2019>> - REAR
Porsche 982 (718) Cayman GT4 2019>> - REAR

Porsche 992.1 Carrera GTS - REAR
Porsche 992.1 Carrera 4 GTS - REAR
Porsche 992.1 turbo - REAR

The Zimmermann Formula Z brake disc was designed with the aim of teaming simple installation with optimum braking effect under high mechanical and thermal load.
The compound brake disc developed by Zimmermann accommodates the increased demands incurred by engine tuning and optimised chassis structures.

Your advantages:
• Excellent deceleration action and no distortion of friction ring at high temperatures
• Substantial weight saving and therefore less unsprung mass
• Floating mounting enables radial expansion of the brake disc under relatively heavy loads, thus preventing shielding and increasing resistance to heat cracks
• „Hot spots" prevented by optimised design of ventilation channels
• 1:1 exchange of original disc possible
• Not subject to registration: general ABE certification supplied with disc
• No conversion required for brake tuning

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

9GT61560
460.4537.70
460.4536.70
98135240780
98135240781
99135240700
99135240703
98135240880
98135240881
99135240800
99135240803
9GT615601F
9GT615602F

The product you are viewing cross references to these numbers
Floating brake disc set slotted FRONT. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder - 98135140581, 98135140681, 98135140580, 98135140680, 99135140581, 99135140681 - 9M9GT615301N
3
Floating brake disc set slotted FRONT. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder
9M9GT615301N
Product Information
Product Information
Floating brake disc set, Front - Slotted. 
Sold as a pair

Fits:

Porsche 991 GT3 / GT3 RS - 2014 to 2021
Porsche 981 Cayman GT4 - 2015 to 2016
Porsche 718 Cayman GT4 - 2019 Onwards
Porsche 718 Spyder - 2019 Onwards

9m floating front brake disc replacement set 
Not suitable as PCCB conversion

Disc size : 380 x 34 mm
Direct replacement for steel assemblies with 380mm front discs

Hat and Floating disc assembly kit with slotted road brake discs (Left and Right)
Two-piece floating slotted  front iron disc upgrade (including centre lock wheels)

  • Rotors come with 72 cooling vanes for optimal cooling.
  • Assemblies made of CM-250  formulated high carbon alloy cast iron, it allows for high-temperature strength and durability.
  • Hat assemblies are CNC machined from 7075 T6 material then hard anodised.
  • Rotor rings are heat treated to release stress in the rotor to avoid deformation and vibration.




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

9M9GT615301N
98135140581
98135140681
98135140580
98135140680
99135140581
99135140681

The product you are viewing cross references to these numbers
Floating brake disc set slotted REAR. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder - 99135240780, 99135240880, 98135240780, 98135240880, 98135240781, 98135240881 - 9GT615601N
3
Floating brake disc set slotted REAR. Porsche 991 GT3 / 981 GT4 / 718 GT4 / 718 Spyder
9GT615601N
Product Information
Product Information
Floating brake disc set, Rear - Slotted. 
Sold as a pair

Fits:

Porsche 991 GT3 / GT3 RS - 2014 to 2021
Porsche 981 Cayman GT4 - 2015 to 2016
Porsche 718 Cayman GT4 - 2019 Onwards
Porsche 718 Spyder - 2019 Onwards

9m floating rear brake disc replacement set 
Not suitable as PCCB conversion 

Disc size : 380 x 30mm
Direct replacement for steel assemblies with 380mm rear discs

Hat and Floating disc assembly kit with slotted road brake discs (Left and Right)
Two-piece floating slotted  front iron disc upgrade (including centre lock wheels)

  • Rotors come with 48 cooling vanes for optimal cooling.
  • Assemblies made of CM-250  formulated high carbon alloy cast iron, it allows for high-temperature strength and durability.
  • Hat assemblies are CNC machined from 7075 T6 material then hard anodised.
  • Rotor rings are heat treated to release stress in the rotor to avoid deformation and vibration.




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

9GT615601N
99135240780
99135240880
98135240780
98135240880
98135240781
98135240881

The product you are viewing cross references to these numbers
DISPLAYING 1 to 6 (of 6 products)
About SPORTS Brake Disc

Experience race-inspired stopping power with Porsche sports brake discs from Design911. Designed for performance driving, these upgraded brake rotors provide greater heat dissipation, improved bite, and enhanced fade resistance, ensuring confidence under even the most demanding conditions.

What They Are & What They Do
Sports brake discs (or rotors) are precision-engineered components that work with brake pads to generate friction and stop the car effectively. Unlike standard discs, sports variants are often drilled, grooved, or slotted, helping to vent heat and gases, improve braking response, and maintain consistent performance during high-speed or repeated stops.

Why They Fail
Over time, brake discs wear down from heat cycles, friction, and corrosion. Common signs of failure include scoring, warping, cracking, or vibration during braking. Track use or aggressive driving can accelerate wear, while low-quality discs may develop hotspots and fade under stress.

Why They Should Be Replaced
Replacing worn or damaged brake discs restores optimal braking efficiency, pedal feel, and vehicle control. New sports discs not only improve performance and safety but also extend pad life and reduce fade, ensuring Porsche’s legendary stopping precision. Design911 offers genuine Porsche discs for factory performance and aftermarket upgrades for enhanced durability and responsiveness.

Whether you’re restoring a classic 911 or tuning a Cayman or Taycan for track use, our range of sports discs combines precision, reliability, and performance to keep your Porsche braking like new.

Aftermarket Performance Brake Discs
High-quality aftermarket discs featuring slotted or drilled designs for superior airflow, reduced fade, and consistent friction performance.

Front Sports Brake Discs
Heavy-duty front rotors built to handle intense braking loads, offering maximum stopping power and stability under pressure.

Rear Sports Brake Discs
Rear discs designed for balanced braking and improved heat management, ensuring control and composure under repeated deceleration.

Drilled & Grooved Brake Rotors
Advanced rotors engineered to dissipate heat, clean brake pads, and deliver responsive braking for track and fast-road applications.

Motorsport & Track Brake Discs
Race-grade rotors made from high-carbon or composite materials, offering unmatched durability and thermal control for competition use.

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Porsche Brake Disc Upgrades: Venting, Drilling, and Grooving Explained

Today we’re talking brake discs: the unsung heroes of your Porsche’s stopping power. What do they do? How can you tell when they need replacing? And what are the upgrade options for enhanced performance? It’s all here. We’ll explore the evolution of brake disc designs, from solid to vented, drilled, and grooved, explaining how each type improves performance. Plus, we’ll break down the materials: durable cast iron, high-carbon steel, and Porsche’s high-performance options like carbon ceramic and surface-coated discs. Whether you’re looking for better braking on the track or a cost-effective daily driving solution, we’ve got you covered.
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