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Porsche > Cayman 987C/981C (2005-2016) > Cayman GT4 3.8L 2015-16 > Brakes >

SPORTS Brake Disc

SPORTS Brake Disc

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Two piece brake disc rotor, Front. Formula:R. Porsche 981 Cayman GT4 without PCCB (OE No 98134140580 & 98134140680) - 98135140580, 98135140680, 9GT615301N, 9GT615302N, 98135140581, 98135140681
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Two piece brake disc rotor, Front. Formula:R. Porsche 981 Cayman GT4 without PCCB (OE No 98134140580 & 98134140680)
98135140
Product Information
Product Information
Two piece Zimmermann Formula:R front brake disc rotor.
For cars WITOUT Porsche Ceramic Brakes (PCCB)

Internally Vented, Perforated, Coated
Outer diameter: 380 mm
Brake Disc Thickness: 34 mm
Bolt Hole Circle Ø: 130 mm
Centering Diameter: 98 mm
Total Height: 69 mm

For Track Use Only

zimmermann

front
Porsche 981 Cayman GT4 - 2015 to 2016 - FRONT


The Formula:R product line is the result of collaboration with the Zimmermann-sponsored racing team. Formula:R composite brake discs sometimes replace very expensive carbon-ceramic brake systems and are intended exclusively for use on the racetrack.
The composite technology with a light metal pot results in a significant weight reduction. This weight reduction leads to a clearly improved driving performance, since the brake discs are part of the unsprung mass. The ratio of unsprung to sprung mass is thereby increased in favor of the sprung mass. The traction and thus the control over the vehicle are noticeably improved.

Your advantages:

• Proven in racing
• Specially coated light metal pot and high-carbon cast friction ring with optimal thermal conductivity
• Highest performance of the disc even when it is temporarily hot
• Optimal ventilation and maximum stability thanks to sloping ribs in the ventilation channel
• Partly as a replacement for carbon-ceramic brake discs
• Free radial expansion through social connection of pot and friction ring
• Brake fading is avoided
• Sporty look with Z-grooves
• Developed exclusively for the race track

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Related, superseded, cross reference or alternative numbers for comparison.

98135140
98135140580
98135140680
9GT615301N
9GT615302N
98135140581
98135140681

The product you are viewing cross references to these numbers
DISPLAYING 17 to 17 (of 17 products)
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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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