Girodisc caliper stud kits for Porsche 911, Cayman and Boxster. Each kit converts the factory caliper bolts to high-strength studs with 12-point nuts and washers, so the caliper can be removed and re-fitted repeatedly at the track without wearing the threads in the upright. Every Porsche kit is in this one listing: pick your kit from the drop-down using the fitment table below.
Which kit do I need?
| Kit | Part # | Fits |
|---|---|---|
| Kit 1 | BCS-01 |
911 (991): 991.1 Carrera S/4S/GTS 911 (992): 992.1 Carrera S/4S; 992.2 Carrera Base/C4/T 911 (996): 996 Carrera 4S; 996 Turbo; 996.1 GT3 911 (997): 997 Carrera S/4S/GTS Cayman/Boxster: 981 Boxster Spyder; 981 Cayman Base |
| Kit 2 | BCS-02 |
911 (991): 991 GT3, GT3 RS, GT2 RS; 991 Turbo, Turbo S; 991.2 Carrera Base/C4/T; 991.2 Carrera S/4S/GTS 911 (992): 992 GT3; 992 GT3 RS; 992 Turbo; 992.1 Carrera S/4S; 992.1 GTS; 992.2 S/4S/GTS 911 (997): 997 Turbo; 997.1 GT3, GT3 RS, GT2; 997.2 GT3, GT3 RS, GT2 RS Cayman/Boxster: 718 Boxster Spyder; 718 Cayman GT4; 718 Cayman GT4 RS |
| Kit 3 | BCS-03 |
911 (991): 991.1 Carrera Base/C4; 991.1 Carrera S/4S/GTS; 991.2 Carrera Base/C4/T; 991.2 Carrera S/4S/GTS 911 (992): 992.1 Carrera Base/C4/T 911 (996): 996 GT2; 996.2 GT3 911 (997): 997.2 Carrera Base/C4 Cayman/Boxster: 718 Cayman Base; 718 Cayman S/GTS; 718 Cayman GTS 4.0; 981 Boxster Spyder; 981 Cayman S/GTS |
| Kit 4 | BCS-04 |
911 (996): 996 Carrera Base/C4 911 (997): 997.1 Carrera Base/C4 Cayman/Boxster: 718 Cayman Base; 718 Cayman S/GTS; 981 Cayman Base; 981 Cayman S/GTS; 986 Boxster S; 987 Cayman S/R |
| Kit 5 | BCS-05 |
911 (991): 991.1 Carrera Base/C4; 991.1 Carrera S/4S/GTS; 991.2 Carrera S/4S/GTS 911 (992): 992.1 Carrera S/4S; 992.2 Carrera Base/C4/T 911 (996): 996 GT2; 996 Turbo; 996.2 GT3 911 (997): 997 Carrera S/4S/GTS; 997 Turbo; 997.1 GT3, GT3 RS, GT2 Cayman/Boxster: 718 Cayman S/GTS; 718 Cayman GTS 4.0; 981 Cayman S/GTS; 987 Cayman S/R |
| Kit 8 | BCS-08 |
911 (991): 991 GT3, GT3 RS, GT2 RS 911 (992): 992 GT3; 992 GT3 RS Cayman/Boxster: 718 Boxster Spyder; 718 Cayman GT4; 718 Cayman GT4 RS |
| Kit 9 | BCS-09 |
911 (991): 991 Turbo, Turbo S; 991.2 Carrera Base/C4/T; 991.2 Carrera S/4S/GTS 911 (992): 992 Turbo; 992.1 Carrera S/4S; 992.1 GTS; 992.2 S/4S/GTS |
| Kit 11 | BCS-11 |
911 (996): 996 Carrera 4S; 996 Turbo; 996.1 GT3 911 (997): 997 Carrera S/4S/GTS |
| Kit 13 | BCS-13 |
911 (991): 991.1 Carrera Base/C4; 991.1 Carrera S/4S/GTS 911 (997): 997 Turbo; 997.1 GT3, GT3 RS, GT2; 997.2 GT3, GT3 RS, GT2 RS |
Several kits list the same model. That is because Porsche fitted different calipers and hubs to the same model depending on trim, year and brake option (iron vs. PCCB, standard vs. big-brake package). Girodisc keys each kit to the caliper bolt size and length, not just the model, so check the brake package your car left the factory with. If you are unsure, contact PHD Racing with your VIN before ordering and we will confirm the kit.
What's in the box
- Four (4) caliper studs, sized for your caliper and hub
- Four (4) 12-point nuts
- Four (4) washers
As pictured: one kit covers two calipers (one axle). Front and rear may take different kits – check both axles in the table above.
Product photo is supplied by Girodisc and is representative of the stud kit family; stud length and thread differ by kit.
