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SPORTS Brake Disc
A popular upgrade to the 996 Carrera 4S and Turbo is larger diameter rotors – swapping out stock 330 mm rotors to larger 350 mm rotors like those on the 997 Turbo. This change provides better braking action and feel.
Rennkit™ has the solution: Cal*Cool™ brake caliper coolers. A quick modification that allows excess heat to dissipate much faster. Conductive and convective heat transfer quickly dissipates brake caliper heat while driving. When parked, conductive and radiative heat transfer continue to effectively remove heat from hot calipers. Track tested – all 4 corners remained below 370F:

Porsche 996 TT 2001-04 Front & Rear
Porsche 996 C4S 2001-04 Front & Rear
Fits With:
997 Turbo Front Disc Part No
99735140501 Front Left
99735140601 Front Right
997 Turbo Rear Disc Part No
99735240502 Rear Left
99735240602 Rear Right
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05


Porsche Boxster (986/987) S 1999>> 3.2L FRONT
Porsche Boxster 987 MKII 2009>> FRONT
Porsche 987C MKI Cayman 3.4L 2005>> FRONT
Porsche 987C MKII Cayman 2009>> FRONT
Porsche 911 (996) 1997-05 FRONT
Porsche 911 (997) C2 2005>> FRONT
Porsche 911 (997) C4 2005>> FRONT
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996.F.SEB.1
The product you are viewing cross references to these numbers
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12


Porsche 996 C4S
Porsche 996 Turbo 2000>>
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.F.UG.ABS
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05


Porsche 996 C4S
Porsche 996 Turbo 2000>>
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.F.UG.SEB
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05


Porsche 996 C4S
Porsche 996 Turbo 2000>>
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.F.UG.ZIM
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05


Porsche 996 C4S
Porsche 996 Turbo 2000>>
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.F.UG.SHW
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
Fast Road / Trackday Front Brake Disc & Pad Package
A complete front braking upgrade combining 9M two-piece
floating slotted iron brake discs with matching 9M fast road and trackday brake
pads.
Fits:
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII GT2 RS 2011-13
Developed for demanding road driving and track use, this package combines improved disc cooling and thermal management with a high-friction, fade-resistant brake pad compound. The result is increased stopping performance, consistent pedal feel and greater resistance to the high temperatures generated during repeated heavy braking.
Not compatible with Porsche Ceramic Composite Brake (PCCB) discs.
What Does the Package Include?
The package combines:
The discs and pads have been selected to work together as a performance-focused braking package for fast-road, trackday and competition applications.
Two-Piece Floating Front Brake Discs
The 9M front discs use a two-piece floating construction with a high-carbon cast iron friction ring mounted to a lightweight aluminium bell.
The floating arrangement allows controlled movement between the rotor and bell as temperatures increase, helping accommodate thermal expansion and reduce stress within the disc assembly.
Benefits include:
- Improved thermal management
- Reduced risk of heat-related distortion
- Reduced tendency towards brake vibration
- Consistent performance during repeated heavy braking
- Lightweight aluminium centre bell
- Improved cooling compared with conventional disc designs
72-Vane Cooling System
Each rotor features 72 internal cooling vanes designed to move air efficiently through the disc.
This increased airflow helps dissipate heat generated under braking, making the system particularly suited to repeated high-speed stops during spirited road driving and track use.
CM-250 High-Carbon Iron Rotors
The rotor rings are manufactured from CM-250 formulated high-carbon alloy cast iron, providing strength and durability at elevated operating temperatures.
Each rotor ring is heat treated to relieve internal material stresses, helping maintain dimensional stability and reduce the possibility of deformation and vibration through repeated heating and cooling cycles.
CNC-Machined Aluminium Bells
The centre bells are CNC machined from 6061-T6 aluminium before being hard anodised for increased surface protection and durability.
The aluminium construction also helps reduce rotating and unsprung mass compared with an equivalent one-piece iron disc.
9M Fast Road / Trackday Brake Pads
The package includes 9M performance front brake pads developed to complement the upgraded iron discs.
The low-metallic, resin-bonded friction material contains steel and aramid fibres and provides a high coefficient of friction of approximately 0.55.
The compound combines strong stopping power with excellent modulation, predictable release characteristics and high resistance to brake fade.
Fast Road & Trackday Performance
During repeated heavy braking, conventional road pads can exceed their optimum operating temperature and begin to lose effectiveness.
The 9M compound is designed to maintain consistent braking characteristics throughout its effective temperature range, providing a solid and predictable pedal feel during demanding driving.
Benefits include:
- High coefficient of friction – approximately 0.55
- Increased stopping performance
- Excellent fade resistance
- Consistent braking at elevated temperatures
- Good pedal modulation
- Predictable brake release
- Solid pedal feel
- Excellent pad and rotor life
- Suitable for fast-road driving
- Suitable for high-speed trackdays and competition use
Important PCCB Information
This brake disc and pad package is not compatible with Porsche Ceramic Composite Brake (PCCB) discs.
It is intended for vehicles using the appropriate iron/steel
braking configuration. Always confirm the brake system fitted to the vehicle
before ordering.
Fast Road and Track
Brake Upgrades
For Porsche GT models used for fast-road driving and trackdays, upgrading the front discs and pads together provides a more complete approach to improving braking performance.
The 9M package combines floating high-carbon iron discs with a high-friction pad compound, improving heat management, fade resistance, pedal consistency and stopping performance during repeated hard braking.
It is particularly suited to Porsche 996 GT2, 996.2 GT3, 997 GT3 and GT3 RS owners looking for a matched front brake upgrade for performance road driving, trackdays and competition use.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9M99735140990KIT
The product you are viewing cross references to these numbers
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII GT2 RS 2011-13
##
#
Porsche 996 C4S (REAR)
Porsche 996 Turbo 2000>> (REAR)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.R.UG.ABS
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
##
#
Porsche 996 C4S (REAR)
Porsche 996 Turbo 2000>> (REAR)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.R.UG.SEB
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
##
#
Porsche 996 C4S (REAR)
Porsche 996 Turbo 2000>> (REAR)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.R.UG.SHW
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
###zimmermann ##

Porsche 996 C4S (REAR)
Porsche 996 Turbo 2000>> (REAR)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEKIT996TT.R.UG.ZIM
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05


Porsche 996 TT 2001-04 Front
Porsche 996 C4S 2001-04 Front
Fits With:
997 Turbo Front Disc Part No
99735140501 Front Left
99735140601 Front Right
The Porsche 996 Turbo and C4S model was designed and built with high performance braking in mind. However, this amazing platform has now become a popular vehicle for the track use. With track racing comes the needs for improved braking over what the stock 4piston 330mm brakes can handle. Brake engineering at the simplest is about how you can have clamping force over a large surface area and dissipate the heat to keep the brakes from fading.
What has Designtek engineered is a Plus 1 Bracket Kit which allows you to take the factory 4piston 330mm brakes and upgrade to the 350mm OEM rotors that are found on the Porsche 997 Turbo.
This bracket kit is essentially a spacer that goes between your caliper and the wheel carrier to allow your caliper to fit over the larger rotors. The larger rotors will give you increased surface area to provide you better braking and longer pad life. Our brackets are CNC machined 6061 aluminum to keep the weight down. Since this is an important safety component, we have had the brackets hard anodized.
Each Kit is sold as a pair of fronts or pair of rears. These kits fit all 2001-2005 Porsche 996 Turbo or C4S with standard non ceramic brakes.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3604109601
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05


Porsche 996 TT 2001-04 Rear
Porsche 996 C4S 2001-04 Rear
Fits With:
997 Turbo Rear Disc Part No
99735240502 Rear Left
99735240602 Rear Right
The Porsche 996 Turbo and C4S model was designed and built with high performance braking in mind. However, this amazing platform has now become a popular vehicle for the track use. With track racing comes the needs for improved braking over what the stock 4piston 330mm brakes can handle. Brake engineering at the simplest is about how you can have clamping force over a large surface area and dissipate the heat to keep the brakes from fading. What Designtek has engineered is a Plus 1 Bracket Kit which allows you to take the factory 4piston 330mm brakes and upgrade to the 350mm OEM rotors that are found on the Porsche 997 Turbo.
This bracket kit is essentially a spacer that goes between your caliper and the wheel carrier to allow your caliper to fit over the larger rotors. The larger rotors will give you increased surface area to provide you better braking and longer pad life. Our brackets are CNC machined 6061 aluminum to keep the weight down. Since this is an important safety component, we have had the brackets hard anodized. The kit includes longer bolts needed to install as well as new washers.
Each Kit is sold as a pair of fronts or pair of rears. These kits fit all 2001-2005 Porsche 996 Turbo or C4S with standard non ceramic brakes.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3604109602
The product you are viewing cross references to these numbers
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05


Fits:
This is a 325mm Upgrade with spacers & hardware
Porsche 996 C2 / C4
Porsche 997 C2 / C4
Kit Contains:
Brake Disc 325MM complete with centre bell.
Brake Disc Type: 2-Piece Drilled & 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 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08


Fits:
This is a 340mm Upgrade with spacers & hardware
Porsche 996 C2 / C4
Porsche 997 C2 / C4
Porsche 987 Cayman S
Porsche 987 Cayman R
Porsche 986/987 Boxster S
Kit Contains:
Brake Disc 340MM complete with centre bell.
Brake Disc Type: 2-Piece Drilled & 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 S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman S / R 3.4L 987C MKII 2009-12


Fits:
Porsche 996 GT3 MK1 and MK2 with PCCB
Porsche 996 GT2 with PCCB
Porsche 996 GT3
Porsche 996 GT2
Porsche 997.1 GT3 without PCCB
Porsche 997.1 GT2 without PCCB
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 996 GT2 2001-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
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.