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Vehicle Fitment
Listed fitment: Porsche 911, Cayman, and Boxster 991, 991.1, 991.2, 992, 992.1, 981, and 982.
If you are unsure which Girodisc rotor fits your brake package, contact us before ordering.
GiroDisc GP35-1389.18 Porsche 911 / Cayman / Boxster Front GP35 Race Brake Pads
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GiroDisc GP35-1389.18 front race pads use the 1389 front pad shape for the listed Porsche Carrera, Cayman and Boxster brake systems. The application list covers particular 991/992 Carrera and 981/718 brake upgrades, with disc sizes and mounting requirements retained for each model.
GP35 is GiroDisc's all-round race compound, developed to balance braking bite with useful pad life. Its progressive torque response supports modulation and controlled release during trail braking. The compound is designed for use with road-car and motorsport ABS systems, on compatible iron discs.
Key Features
- Exact GiroDisc reference: GP35-1389.18.
- 1389 front pad shape for the specifically listed Carrera, Cayman and Boxster setups.
- All-round race compound for circuit use.
- Progressive braking response and compatibility with road-car and motorsport ABS.
Vehicle Fitment and Brake Setup
| Vehicle | Axle | Model years | Required brake setup |
|---|---|---|---|
| Porsche 911 Carrera/C4 (991.1) | Front | Front/rear 350/350mm, use S rear pad for full sweep | |
| Porsche 911 Carrera/C4/T (991.2) | Front | Front/rear 350/350mm, use S rear pad for full sweep | |
| Porsche 911 Carrera/C4/T (992.1) | Front | Front/rear 350/350mm, use S rear pad for full sweep | |
| Porsche Cayman/Boxster (981) | Front | Base, Front/rear 340/325mm with spacers & hardware | |
| Porsche Cayman/Boxster S/GTS (981) | Front | Front/rear 350/325mm with spacers & hardware | |
| Porsche 718 Cayman/Boxster (982) | Front | Base, Front/rear 350/325mm with spacers & hardware | |
| Porsche 718 Cayman/Boxster S/GTS (982) | Front | Front/rear 350/325mm with spacers & hardware |
Brake compatibility: Use with compatible iron discs only. Retain the listed front-disc diameter, caliper spacer and hardware requirements. Carrera rows that specify an S-model rear pad refer to a separate rear-axle requirement and do not alter this front pad reference.
The brake setup notes identify the complete vehicle configuration. Disc dimensions, caliper spacers or mounting hardware mentioned in an application are not additional items included with these pads or shields.
Product Specifications
| Part number | GP35-1389.18 |
| Brand | GiroDisc |
| Product type | Brake Pads |
| Axle | Front |
| Compound | GP35 |
| Pad shape | 1389.18 |
Recommended Supporting Upgrades
Compatible disc configurations include A1-035 iron disc assembly, A1-153 iron disc assembly, A1-203 iron disc assembly, subject to the exact brake option in the fitment table.
Explore GiroDisc Porsche brakes and the complete GiroDisc range for supporting brake components.
Installation and Care
Have the pad profile, retaining hardware and disc condition checked before installation. Follow the brake pad manufacturer's bedding procedure with compatible discs, and inspect the calipers as part of the same brake service.
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 Pads
- Part number / SKU
- GP35-1389.18
- Vehicle make
- Porsche
- Vehicle model
- 911, Cayman, and Boxster
- Vehicle variant
- 991, 991.1, 991.2, 992, 992.1, 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, Cayman, and Boxster 991, 991.1, 991.2, 992, 992.1, 981, and 982.
If you are unsure which Girodisc rotor fits your brake package, contact us before ordering.
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