Giro Slotted Brake Disc

Brake caliper mounting stud kit GiroDisc
One kit per axle



Fits:

Porsche 997 turbo - 2007 to 2012 with PCCB
Porsche 997 GT3 Cup 
Porsche 997.1 GT3 / GT2  - 2007 to 2008 with PCCB
Porsche 997.2 GT3 / GT2  - 2010 to 2012 WITHOUT PCCB
Porsche 991 turbo / turbo S - 2012 to 2018 with PCCB
Porsche 991.2 Carrera 2 / 4  / 4S - 2016 to 2018 with PCCB
Porsche 991 GT3 / GT3RS - 2012 to 2018 WITHOUT PCCB
Porsche 991 GT3 /GT3RS / GT2RS 2012 to 2018 with PCCB
Porsche 992 GT3 - 2018 Onwards with or without PCCB
Porsche 981 Cayman GT4 - 2015 to 2016 with or without PCCB
Porsche 718 Cayman GT4 RS with or without PCCB
Porsche 718 Cayman GT4,
Porsche 718 Boxster Spyder with or without PCCB

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Related, superseded, cross reference or alternative numbers for comparison.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-02

The product you are viewing cross references to these numbers

Brake caliper mounting stud kit GiroDisc
One kit per axle



Fits: - Rear

Porsche 981 Cayman GT4 - 2015 to 2015 with or without PCCB 
Porsche 718 Cayman GT4 - 2017 Onwards with or without PCCB
Porsche 718 Boxster Spyder - 2017 Onwards with or without PCCB
Porsche 718 Cayman GT4 RS with or without PCCB
Porsche 991.1 GT3 / GT3 RS - 2012 to 2018 without PCCB
Porsche 991 GT3 / GT3RS / GT2RS - 2012 to 2018 with PCCB 
Porsche 992 911 GT3 - 2019 Onwards with or without PCCB

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-08

The product you are viewing cross references to these numbers

Brake Disc / Rotor Slotted 2-pc FRONT




Fits:
Porsche 718 GT4 RS

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.

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Related, superseded, cross reference or alternative numbers for comparison.

A1-291S

The product you are viewing cross references to these numbers

Brake Disc / Rotor Slotted 2-pc FRONT




Fits:
Front rotor: 410mm Direct Replacement – Requires use of OEM Porsche iron rotor pad shape
Porsche 981 Cayman GT4 with Ceramic brake (PCCB)
Porsche 718 Cayman GT4 with Ceramic brake (PCCB)
Porsche 991 with Ceramic brake (PCCB)
Porsche 991.2 with Ceramic brake (PCCB)
Porsche 991 turbo / turbo S with Ceramic brake (PCCB)
Porsche 992 Carrera S / 4S with Ceramic brake (PCCB)
Porsche 992 turbo without Ceramic brake (PCCB) - Use GT3 pad shape

Kit Contains:
Brake Disc 410MM 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.

Brake Disc / Rotor Slotted 2-pc FRONT and REAR




Fits:
Porsche 997 Turbo with PCCB & CENTRE LOCK
Porsche 991 Turbo
Porsche 981 Cayman GT4 with steel disc
Porsche 718 Cayman GT4 with steel disc

Kit Contains:
Brake Disc 380MM 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.

Brake Disc / Rotor Slotted 2-pc REAR




Fits:
Rear rotor: 380mm Direct Replacement
Porsche 981 Cayman GT4 without Ceramic Brake (PCCB)
Porsche 718 Cayman GT4 without Ceramic Brake (PCCB)
Porsche 991 turbo / turbo S without Ceramic Brake (PCCB)
Porsche 992 turbo without Ceramic Brake (PCCB)

Kit Contains:
Brake Disc 380MM 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.

Brake Disc / Rotor Slotted 2-pc REAR




Fits:
REAR rotor: 390mm Direct Replacement
Porsche 981 Cayman GT4 with Ceramic brake (PCCB)
Porsche 718 Cayman GT4 with Ceramic brake (PCCB)
Porsche 991 with Ceramic brake (PCCB)
Porsche 991.2 with Ceramic brake (PCCB)

Kit Contains:
Brake Disc 390MM 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.

Brake Disc / Rotor Slotted 2-pc REAR


Fits:
Rear iron rotor: 390mm Direct Replacement
Porsche 991 GT3 with Ceramic brake (PCCB)
Porsche 991 GT2RS with Ceramic brake (PCCB)
Porsche 992 GT3 with Ceramic brake (PCCB)
Porsche 982 GT4RS with Ceramic brake (PCCB)

Kit Contains:
Brake Disc 390MM 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.

Brake Disc / Rotor Slotted 2-pc REAR 992 GT3 excl. PCCB


Fits:
Porsche 992 GT3 excl. PCCB
Porsche 718 GT4 RS

Kit Contains:
Brake Disc complete with centre bell.

Brake Disc Type: 2-Piece Slotted

The Girodisc system is a direct replacement for the OE disc on the 992 GT3 with OEM iron rotors. No modifications are necessary, and it allows the use of unmodified factory pads. The disc will bolt directly to the car and work with factory calipers.

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 12 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.

This product is a special order item, allow 5 - 7 working days for delivery.

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

A2-272S

The product you are viewing cross references to these numbers

Rear replacement brake disc (390mm) - slotted - for cars with PCCB and existing GiroDisc hats.

Includes replacement hardware; the only parts you will reuse are your existing GiroDisc hats.




Porsche 981 Cayman GT4 / RS 2016 - w/ PCCB.
--
Porsche 718 (982) Cayman GT4 / RS 2019>> - w/ PCCB.
Porsche 718 (982) Boxster Spyder / RS 2019>> - w/ PCCB.
--
Porsche 991.2 Carrera / S / 4 / 4S / GTS / T 2017-19 - w/ PCCB.
Porsche 991 Turbo / Turbo S / GT2 RS 2014-20 - w/ PCCB.
Porsche 991 GT3 / GT3 RS 2014-21 - w/ PCCB.
--
Porsche 992.1 Carrera S / 4S / GTS 2019-24 - w/ PCCB.
Porsche 992 GT3 / GT3 RS 2021>> - w/ PCCB.

NOTE: This listing is for replacement discs specifically designed for vehicles already equipped with GiroDisc's two-piece rotor system. Please note that this product cannot be used as a standalone upgrade.

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

D2-154S

The product you are viewing cross references to these numbers

Front replacement brake disc (410mm) - slotted - for cars with PCCB and existing GiroDisc hats.

Includes replacement hardware; the only parts you will reuse are your existing GiroDisc hats.




Porsche 981 Cayman GT4 / RS 2016 - w/ PCCB.
--
Porsche 718 (982) Cayman GT4 / RS 2019>> - w/ PCCB.
Porsche 718 (982) Boxster Spyder / RS 2019>> - w/ PCCB.
--
Porsche 991.2 Carrera / S / 4 / 4S / GTS / T 2017-19 - w/ PCCB.
Porsche 991 Turbo / Turbo S / GT2 RS 2014-20 - w/ PCCB.
Porsche 991 GT3 / GT3 RS 2014-21 - w/ PCCB.
--
Porsche 992.1 Carrera S / 4S / GTS 2019-24 - w/ PCCB.
Porsche 992 GT3 / GT3 RS 2021>> - w/ PCCB.

NOTE: This listing is for replacement discs specifically designed for vehicles already equipped with GiroDisc's two-piece rotor system. Please note that this product cannot be used as a standalone upgrade.

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

D1-154S

The product you are viewing cross references to these numbers

Titanium Brake pad heat shields. Front Porsche 991, 992 , GT4   Price is per axle (four pieces)

This Product Fits:

Porsche 991 , 992  & GT4 

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 good 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 loosing 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.