Click to open expanded view

Girodisc 2 Piece Rear Rotors Porsche 981 Boxster / Cayman

SKU: GIRA2-035
Price
$1,250.00
In Stock and Ready to Ship!

Need some product help?
Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

FAQ

Shipping Information
For items that are in stock, purchases made after 9am EST will be usually be shipped out in the next 1-2 business days. Please inquire to confirm lead times if you have specific time constraints. Orders will be sent via signature required at our discretion unless otherwise requested.

International Shipping
Any and all customs duties, taxes, import fees, and/or tariffs assessed in connection with the purchase shall be the sole responsibility of the customer/end user.

Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. All returns are subject to a restocking fee based on item and package condition. Buyer is responsible for paying for return shipping costs. If you need a return label, we will email you a return label and deduct cost from refund. Original shipping costs are not refundable. Special order items are not eligible for return.

Cancellation Policy
In order to cancel your order you must email within 24 hours of placing your order or before your order has shipped, whichever occurs first. Special order items are not eligible for cancelation.

Exchange Policy
We have a 30-day exchange policy, which means you have 30 days after receiving your item to request an exchange. To be eligible for an exchange, your item must be brand new in box. Buyer is responsible for paying all shipping costs to exchange product.

Product Description

Upgrade the rear braking performance and thermal capacity of your Porsche 981 or 718 with the GiroDisc 2-Piece Rear Brake Rotor Kit. Designed as a performance-oriented replacement for the factory rear brake discs, GiroDisc increases rotor diameter from the factory 298mm to 325mm, providing greater braking leverage and additional capacity to manage heat during aggressive street and track driving. The system retains the factory brake calipers, using the included caliper spacers and longer mounting hardware to accommodate the larger rotor diameter. Each rotor combines a lightweight 6061-T6 aluminum center hat with GiroDisc's proprietary U.S.-cast iron friction ring for a durable, serviceable two-piece design. Racing-derived curved internal vanes actively pump cooling air through the disc, while GiroDisc's floating mounting system allows the friction ring to expand as temperatures rise. Once the GiroDisc system is installed, future servicing requires replacement of only the cast-iron friction rings, allowing the aluminum hats to be reused.

Fitment Notes

  • Designed for applicable Porsche 981 Cayman / Boxster models

  • Designed for applicable Porsche 718 Cayman / Boxster models

  • Upgrades the factory 298mm rear rotor to 325mm

  • Uses the factory rear brake calipers

  • Includes the required caliper spacers and longer mounting bolts

  • Designed as a direct replacement for the factory rotor system with the supplied caliper-spacing hardware

  • Verify exact model and factory brake configuration before ordering

  • 718 GTS 4.0 and 981 Spyder applications use a different GiroDisc rear rotor kit (A2-049B)

Included

  • 2 GiroDisc two-piece rear brake rotors

  • Left and right 6061-T6 aluminum rotor hats

  • Left and right proprietary cast-iron friction rings

  • Caliper spacers

  • Longer caliper mounting bolts

  • GiroDisc floating rotor hardware

Product Specs

  • GiroDisc Part Number: A2-035

  • Position: Rear

  • Quantity: Sold as a pair

  • Rotor Diameter: 325mm

  • Factory Rotor Diameter: 298mm

  • Rotor Design: 2-piece floating

  • Friction Ring Material: GiroDisc proprietary cast iron

  • Hat Material: U.S.-sourced 6061-T6 aircraft-specification aluminum

  • Internal Vane Design: Curved directional cooling vanes

  • Floating Hardware: 10 high-strength alloy-steel drive pins per rotor

  • Drive Pin Finish: Cadmium plated

  • Fasteners: Class 12.9 cap screws with hardened washers

  • Anti-Noise Hardware: Spring washers

  • Replacement Ring Set: D2-035

Product Features

  • Larger 325mm rotor diameter provides increased braking leverage and cooling capacity compared with the factory 298mm rear rotor

  • Two-piece construction combines lightweight aluminum hats with replaceable cast-iron friction rings for a durable, serviceable performance brake solution

  • Racing-derived curved internal vanes act as a centrifugal pump to force cooling air through the rotor during operation

  • GiroDisc's 10-pin floating system allows axial and radial movement between the hat and friction ring as temperatures change

  • Anti-noise spring washers reduce the cold rattle commonly associated with fully floating rotors while still allowing proper thermal expansion

  • Included caliper spacers and longer bolts allow the larger rotors to work with the factory rear calipers without requiring a complete big-brake conversion