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Vehicle Fitment
Listed fitment: Porsche 911, Boxster, and Cayman 996, 997, 997.1, 986, 987, 981, and 982.
If you are unsure which Girodisc rotor fits your brake package, contact us before ordering.
GiroDisc BCS-04 Porsche Caliper Stud Kit, Per Axle
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The GiroDisc BCS-04 Porsche caliper stud kit replaces the original caliper mounting bolts on the exact brake configurations listed below. Select it by vehicle, axle and installed disc setup rather than by Porsche model name alone.
Stud-mounted calipers use retaining nuts to secure the caliper on its mounting studs. This gives the brake assembly a defined mounting arrangement when calipers are removed during disc or pad servicing. A conversion to a different disc size can require a different kit, so both the existing disc and any caliper spacer arrangement must be checked.
Key Features
- GiroDisc caliper mounting kit, part number BCS-04
- Specified Porsche front or rear applications shown individually
- Supplied and priced per axle
- Separate fitment entries for GiroDisc discs and smaller original discs where applicable
Vehicle Fitment and Brake Setup
| Vehicle | Axle | Model years | Required brake setup |
|---|---|---|---|
| Porsche 911 Carrera/C4 (996/997.1) | Front | GiroDisc disc configuration. Front/rear 340/325mm | |
| Porsche 911 Carrera/C4 (996/997.1) | Rear | GiroDisc disc configuration. Front/rear 340/325mm | |
| Porsche Boxster S (986) | Front | GiroDisc disc configuration. Front/rear 340/325mm | |
| Porsche Boxster S (986) | Rear | GiroDisc disc configuration. Front/rear 340/325mm | |
| Porsche Cayman S/R (987) | Front | GiroDisc disc configuration. Front/rear 340/325mm | |
| Porsche Cayman S/R (987) | Rear | GiroDisc disc configuration. Front/rear 340/325mm | |
| Porsche Cayman/Boxster (981) | Rear | GiroDisc disc configuration. Base, Front/rear 340/325mm | |
| Porsche Cayman/Boxster S/GTS (981) | Rear | GiroDisc disc configuration. Front/rear 350/325mm | |
| Porsche 718 Cayman/Boxster (982) | Rear | GiroDisc disc configuration. Base, Front/rear 350/325mm | |
| Porsche 718 Cayman/Boxster S/GTS (982) | Rear | GiroDisc disc configuration. Front/rear 350/325mm |
A listing for both front and rear means the same kit can be suitable on either axle in the stated configuration. One pack does not service both axles. These are caliper mounting studs, not wheel studs.
Compare the complete disc and caliper configuration with the exact entry below. A different original-disc or upgraded-disc arrangement can require another stud kit even on the same model.
Product Specifications
| Part number | BCS-04 |
| Brand | GiroDisc |
| Product type | Caliper Stud Kit |
| Axle | Front or rear, according to the listed application |
| Sold as | One axle kit |
| Mounting location | Brake caliper |
| Disc configuration | See each application row |
Recommended Supporting Upgrades
Explore GiroDisc Porsche brakes and the complete GiroDisc range for supporting brake components.
Installation and Care
Follow the instructions supplied with this kit, including thread preparation, assembly compounds and the separate stud and retaining-nut tightening specifications. Check thread engagement and caliper clearances for the installed disc and spacers. Use the specified hardware for the kit and have installation carried out by a suitably experienced brake technician.
Contact us to confirm availability and lead time before ordering.
Product images may be illustrative. Use the part number and specifications to confirm the item required.
Product specifications
- Brand
- Girodisc
- Product type
- Brake Caliper Stud Kits
- Part number / SKU
- BCS-04
- Vehicle make
- Porsche
- Vehicle model
- 911, Boxster, and Cayman
- Vehicle variant
- 996, 997, 997.1, 986, 987, 981, and 982
Girodisc fitment can vary by factory brake package, disc diameter and caliper. Contact us with your registration or VIN and brake specification if you are unsure.
Warranty: Products are supplied with the applicable manufacturer warranty.
Shipping: We offer UK and worldwide shipping. Supplier-stock delivery estimates are shown above.
Returns: Special-order items may be subject to different cancellation/return conditions.
Klarna payment options are available at checkout where eligible.
Why buy from us?
Vehicle Fitment
Listed fitment: Porsche 911, Boxster, and Cayman 996, 997, 997.1, 986, 987, 981, and 982.
If you are unsure which Girodisc rotor fits your brake package, contact us before ordering.
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