Giro Slotted Brake Disc
Fits:
Porsche 996 C4S
Porsche 996 Turbo without PCCB
Porsche 996.1 GT3
Porsche 997 C2 / C4 / C2S / C4S without PCCB
Porsche 997.2 C2 / C4 / C2S / C4S without PCCB
The
Girodisc system is a direct replacement for the OE disc on all 996
GT2/GT3's. No modifications are necessary. The disc will bolt directly
to the car and work with OE calipers perfectly. By upgrading your brakes
with lightweight high performance replacements as opposed to a big
brake kit, your factory bias is maintained as well as your ABS
efficiency. The Girodisc front rotors are approx 21.0 lbs vs. 25.6 lbs
for the stock units. This reduction in rotational and unsprung weight
allows for quicker acceleration and suspension response.
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 10 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.
Sold/priced per pair
This product is a special order item, allow 5 - 7 working days for delivery.
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 997 Carrera 2 3.6L 2005>>
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4 3.6L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
- Porsche 997 MKII Carrera C2 3.6L 2009>>
- Porsche 997 MKII Carrera C4 3.6L 2009>>
- Porsche 997 MKII Carrera C2S 3.8L 2009>>
- Porsche 997 MKII Carrera C4S 3.8L 2009>>
In stock 
Fits:
This is a 350mm Upgrade with spacers & hardware
Porsche 996 C4S
Porsche 996 Turbo without PCCB
Porsche 997 C2 / C4 / C2S / C4S 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. The rotor rings are bright zinc plated to help prevent unsightly corrosion
This discs will fit cars with the Ceramic option from factory.
This product is a special order item, allow 5 - 7 working days for delivery.
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 997 Carrera 2 3.6L 2005>>
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4 3.6L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
In stock
One kit per axle
Fits:
Porsche 996 Carrera 4S - 2001 to 2005
Porsche 996 turbo - 2000 to 2005
Porsche 996.1 GT3 - 1999 to 2002
Porsche 997.1 Carrera S / Carrera 4S - 2005 to 2008
Porsche 981 Boxster 2.7ltr - 2012 to 2016
Porsche 981 Cayman 2.7ltr - 2013 to 2016 - 340mm front disc
Porsche 981 Boxster Spyder 3.8ltr - 2016
Girodisc caliper studs are a direct replacement for the OEM caliper bolts.
A must-have item for those who track or race their cars often. The factory bolts will quickly strip out the threads in the expensive wheel uprights, from removing the calipers for maintenance. These Cup-style caliper studs will eliminate this problem and quickly pay for themselves. They also allow for quicker and easier caliper installation by guiding the calipers into position. Manufactured from aerospace quality 17-4 PH stainless steel for high strength and corrosion resistance. One kit includes 4 studs, nuts, and washers, complete for one axle. Two kits are required for the front and rear.
These Brake caliper stud kits now include the highest quality available, ARP 12-point nuts. This is a no-compromise solution. Made from high-strength stainless steel, these nuts will not corrode, have a 180,000 PSI tensile strength, and are compact in size for a better fit in the brake caliper bore.
Please Note
If you are not familiar with, or confident that you understand how to replace the caliper bolts with studs please have a certified mechanic perform the installation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BCS-01
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster Spyder 3.8L 2016
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
- Porsche Cayman 2.7L 981 2013-16
In stock
One kit per axle
Fits: - Front 350mm Disc
Porsche 996 Carrera 4S - 2001 to 2005
Porsche 997 Carrera S / 4 S - 2005 to 2008
Porsche 996.1 GT3 - 1999 to 2002
Porsche 996 turbo - 2000 to 2005
Porsche 981 Cayman / Boxster 2.7ltr - 2005 to 2008
Girodisc caliper studs are a direct replacement for the OEM caliper bolts.
A must-have item for those who track or race their cars often. The factory bolts will quickly strip out the threads in the expensive wheel uprights, from removing the calipers for maintenance. These Cup-style caliper studs will eliminate this problem and quickly pay for themselves. They also allow for quicker and easier caliper installation by guiding the calipers into position. Manufactured from aerospace quality 17-4 PH stainless steel for high strength and corrosion resistance. One kit includes 4 studs, nuts, and washers, complete for one axle. Two kits are required for the front and rear.
These Brake caliper stud kits now include the highest quality available, ARP 12-point nuts. This is a no-compromise solution. Made from high-strength stainless steel, these nuts will not corrode, have a 180,000 PSI tensile strength, and are compact in size for a better fit in the brake caliper bore.
Please Note
If you are not familiar with, or confident that you understand how to replace the caliper bolts with studs please have a certified mechanic perform the installation.
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
- Porsche Cayman 2.7L 987C 2006-08
Orderable
One kit per axle
Fits: - Rear 350mm Disc
Porsche 996 Carrera 4S - 2001 to 2005
Porsche 996 turbo - 2000 to 2005
Porsche 996.1 GT3 - 1999 to 2002
Porsche 997.1 Carrera S / Carrera 4S - 2005 to 2008
Girodisc caliper studs are a direct replacement for the OEM caliper bolts.
A must-have item for those who track or race their cars often. The factory bolts will quickly strip out the threads in the expensive wheel uprights, from removing the calipers for maintenance. These Cup-style caliper studs will eliminate this problem and quickly pay for themselves. They also allow for quicker and easier caliper installation by guiding the calipers into position. Manufactured from aerospace quality 17-4 PH stainless steel for high strength and corrosion resistance. One kit includes 4 studs, nuts, and washers, complete for one axle. Two kits are required for the front and rear.
These Brake caliper stud kits now include the highest quality available, ARP 12-point nuts. This is a no-compromise solution. Made from high-strength stainless steel, these nuts will not corrode, have a 180,000 PSI tensile strength, and are compact in size for a better fit in the brake caliper bore.
Please Note
If you are not familiar with, or confident that you understand how to replace the caliper bolts with studs please have a certified mechanic perform the installation.
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
Orderable
One kit per axle
Fits: - Rear 350mm Disc
Porsche 996 Carrera 4S - 2001 to 2005
Porsche 996 turbo - 2000 to 2005
Porsche 996.1 GT3 - 1999 to 2002
Porsche 997.1 Carrera S / Carrera 4S - 2005 to 2008
Girodisc caliper studs are a direct replacement for the OEM caliper bolts.
A must-have item for those who track or race their cars often. The factory bolts will quickly strip out the threads in the expensive wheel uprights, from removing the calipers for maintenance. These Cup-style caliper studs will eliminate this problem and quickly pay for themselves. They also allow for quicker and easier caliper installation by guiding the calipers into position. Manufactured from aerospace quality 17-4 PH stainless steel for high strength and corrosion resistance. One kit includes 4 studs, nuts, and washers, complete for one axle. Two kits are required for the front and rear.
These Brake caliper stud kits now include the highest quality available, ARP 12-point nuts. This is a no-compromise solution. Made from high-strength stainless steel, these nuts will not corrode, have a 180,000 PSI tensile strength, and are compact in size for a better fit in the brake caliper bore.
Please Note
If you are not familiar with, or confident that you understand how to replace the caliper bolts with studs please have a certified mechanic perform the installation.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BCS-10
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 GT3 MKI 1999-02
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
Orderable
Replacement disc only 350mm Upgrade with spacers & hardware
Porsche 996 C4S
Porsche 996 Turbo
Porsche 997 C2 with Ceramic option
Porsche 997 C2S
Porsche 997 C4S
Porsche 997 Turbo
Porsche 997.2 C2 with Ceramic option
Porsche 987 Cayman S w/PCCB
Porsche 991 C2S w/PCCB
Porsche 991 C4S w/PCCB
Porsche 981 Boxster S w/PCCB
Porsche 981 Cayman S w/PCCB
Porsche 718 Boxster S w/PCCB
Porsche 718 Cayman S w/PCCB
- Porsche Boxster S 981 3.4L 2012-16
- Porsche Boxster S 718 2.5L Manual (350 Bhp)
- Porsche Boxster S 718 2.5L PDK (350 Bhp)
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 997 Carrera 2 3.6L 2005>>
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4 3.6L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
- Porsche 997 TURBO 2007>>
- Porsche 997 MKII Carrera C2 3.6L 2009>>
- Porsche 997 MKII Carrera C4 3.6L 2009>>
- Porsche 997 MKII Carrera C2S 3.8L 2009>>
- Porsche 997 MKII Carrera C4S 3.8L 2009>>
- Porsche 997 MKII Turbo 2009>>
- Porsche 991 Carrera C2S 3.8L (400Bhp)
- Porsche 991 Carrera C4S 3.8L (400Bhp)
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman S 3.4L 981 2013-16
- Porsche Cayman S 718 2.5L Manual (350Bhp)
- Porsche Cayman S 718 2.5L PDK (350Bhp)
This Product Fits:
Porsche 986 Boxster S 3.2 99-05 Front
Porsche 987 Boxster S 3.2 05>> Front
Porsche 987C Cayman 06>> Front
Porsche 996 3.4/3.6 97-05 Front
Porsche 997 3.6L C2/C4* 05-09 Front
*Not S 3.8L
Porsche 997 3.6L C2/C4* 09>> Front
*Not S 3.8L
Porsche 996 C4S 02-05 Rear
Porsche 996 GT2 02-05 Rear
Porsche 996 GT3 MKI 99-01 Rear
Porsche 996 GT3 MKII 02-05 Rear
Porsche 996 3.6LTurbo 02-05 Rear
Porsche 997 3.8L C2S/C4S 05-09 Rear
The problem of brake fluid boiling is simply traced to heat transferring from the rotors and pads directly into the fluid through the caliper pistons. When brake fluid boils, it releases air that is normally part of the molecular structure of the fluid. This air is compressible of course, and the brake pedal goes to the floor instead of moving the caliper pistons. Production cars tend to suffer from this on track days more as they don't usually have the extensive cooling duct and exotic brake materials as true racing cars. True racing only brake calipers generally come with titanium caliper pistons for one reason. Titanium as a material has low thermal conductivity. This means that it is very bad at transferring heat, which is fantastic if you are trying to keep your fluid cool.
The Girodisc solution to help prevent fluid boiling is to use a thin titanium shim placed between the pad back and the pistons, to keep the braking heat from transferring into the pistons and fluid. Here is a comparison of materials and their relative thermal conductivity ratings:
Titanium 6AL-4V 6.7 W/mk
Steel 52 W/mk
Aluminum 130 W/mk
You can see that Titanium will transfer far less heat than steel and especially aluminum. For cars that are going to see hard or multiple track days, these shims are cheap protection from losing the pedal due to boiling at the wrong time and making the day very expensive.
Water jet cut to exact size, no cutting, grinding, or swearing involved.
Price is per axle (four pieces)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
TS-917-4
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 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 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 997 Carrera 2 3.6L 2005>>
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4 3.6L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
- Porsche 997 MKII Carrera C2S 3.8L 2009>>
- Porsche 997 MKII Carrera C4S 3.8L 2009>>
- 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
Arriving soon
This Product Fits:
Porsche 996 C4S 02-05 Front
Porsche 996 GT3 MKI 99-01 Front
Porsche 996 Turbo 02-05 Front
Porsche 997 3.8L C2S/C4S 05-09 Front
Porsche 997 3.8L C2S/C4S 09>> Front
The problem of brake fluid boiling is simply traced to heat transferring from the rotors and pads directly into the fluid through the caliper pistons. When brake fluid boils, it releases air that is normally part of the molecular structure of the fluid. This air is compressible of course, and the brake pedal goes to the floor instead of moving the caliper pistons. Production cars tend to suffer from this on track days more as they don't usually have the extensive cooling duct and exotic brake materials as true racing cars. True racing only brake calipers generally come with titanium caliper pistons for one reason. Titanium as a material has low thermal conductivity. This means that it is very bad at transferring heat, which is fantastic if you are trying to keep your fluid cool.
The Girodisc solution to help prevent fluid boiling is to use a thin titanium shim placed between the pad back and the pistons, to keep the braking heat from transferring into the pistons and fluid. Here is a comparison of materials and their relative thermal conductivity ratings:
Titanium 6AL-4V 6.7 W/mk
Steel 52 W/mk
Aluminum 130 W/mk
You can see that Titanium will transfer far less heat than steel and especially aluminum. For cars that are going to see hard or multiple track days, these shims are cheap protection from losing the pedal due to boiling at the wrong time and making the day very expensive.
Water jet cut to exact size, no cutting, grinding, or swearing involved.
Price is per axle (four pieces)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
TS-916-4
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 GT3 MKI 1999-02
- Porsche 997 Carrera 2S 3.8L 2005>>
- Porsche 997 Carrera 4S 3.8L 2005>>
- Porsche 997 MKII Carrera C2S 3.8L 2009>>
- Porsche 997 MKII Carrera C4S 3.8L 2009>>
In stock
-
Brake Pads & Disc Package
-
SPORTS Brake Pads & Disc Package
-
Brake Disc Standard
-
Brake Pads Standard
-
SPORTS Brake Disc
-
Brembo Standard brakes
-
Brembo Racing brakes
-
TEXTAR Brakes
-
PAGID Racing Brakes
-
Zimmermann Brakes
-
Performance Friction Brakes
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EBC Brakes
-
Black Diamond Performance Brakes
-
Surface Transforms Ceramic Brakes
-
Rotinger Graphite Line
-
Replacement for Ceramic Disc
-
Brake Pad Wear Sensors
-
Brake Pad Anti-vibration shims
-
Caliper Bolts / Disc Screws
-
Pin Kit and Guide Plates
-
Performance Brake Hoses
-
Standard Brake Hoses
-
Caliper and Brake Lines
-
Brake Calipers
-
Brake Caliper Upgrades
-
HandBrake Shoes
-
HandBrake Cables
-
Brake Disc Cover Plates
-
ABS | Speed Sensors
-
Caliper Seals |Pistons
-
Brake Servo | Booster
-
Brake Master Cylinder
-
Brake Fluid Reservoir
-
Brake Fluid
-
Centre Locking Hubs
-
Titanium Brake Pad Shields
-
Duct Spoiler / Air Scoop
-
DesignTek Brake Kits
-
Build Your Own Brake Kit
