Girodisc 2 Piece Rear Rotors Porsche 981 Boxster / Cayman

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

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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.

Cancellations / Returns

Original sales receipt or order number must accompany all return requests.

Forza Motor Works accepts returns for exchange, store credit, or refund within fourteen (14) calendar days of the delivery date, subject to the terms and conditions below. After fourteen (14) calendar days, all sales are final unless otherwise approved in writing by Forza Motor Works.

To be eligible for return, products must be in new, unused, unaltered, and resalable condition, including all original packaging, instructions, hardware, documentation, and accessories. Returned items must not show any signs of installation, use, wear, damage, modification, painting, coating, or alteration of any kind.

The following items are non-returnable and non-refundable:

• Special-order products
• Custom-built or made-to-order products
• Products manufactured to customer specifications
• Custom color or finish products
• Manufacturer-direct-shipped products designated as non-returnable
• Products with extended lead times, including but not limited to headers, exhaust systems, wheels, and other special-order performance products
• Any item specifically identified on the product page as non-returnable

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Products determined by Forza Motor Works to have been incorrectly shipped may qualify for replacement, store credit, or refund at our sole discretion. Manufacturer defects are subject to the applicable manufacturer's warranty policies and procedures. Forza Motor Works does not provide any separate product warranty unless expressly stated in writing.

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To obtain a Return Merchandise Authorization (RMA), please contact:

Forza Motor Works
Email: info@forzamotorworks.com

All refunds, exchanges, and store credits are contingent upon inspection and approval of the returned merchandise. Forza Motor Works reserves the right to deny any return that does not comply with this policy.

Approved returns may be subject to a restocking fee of up to twenty five percent (25%) of the purchase price. Original shipping charges are non-refundable. Customer is responsible for all return shipping costs unless the return is the direct result of an error made by Forza Motor Works.

FITMENT, INSTALLATION & PRODUCT USE

Customer is responsible for verifying vehicle compatibility, fitment, and intended use prior to installation. While Forza Motor Works makes reasonable efforts to provide accurate product information and fitment guidance, final responsibility for compatibility rests solely with the customer.

Products that have been installed, test-fitted, modified, painted, coated, damaged, or otherwise used are not eligible for return.

Many aftermarket performance products are intended for off-road, racing, or competition use only and may not be legal for use on public roads in all jurisdictions. Customer is solely responsible for determining compliance with all applicable federal, state, and local laws and regulations.

LIMITATION OF LIABILITY

FORZA MOTOR WORKS SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL DAMAGES ARISING FROM THE PURCHASE, INSTALLATION, USE, MISUSE, FAILURE, OR INABILITY TO USE ANY PRODUCT SOLD BY FORZA MOTOR WORKS.

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TO THE MAXIMUM EXTENT PERMITTED BY LAW, FORZA MOTOR WORKS' TOTAL LIABILITY FOR ANY CLAIM ARISING FROM THE PURCHASE OR USE OF A PRODUCT SHALL NOT EXCEED THE AMOUNT PAID FOR THE SPECIFIC PRODUCT GIVING RISE TO THE CLAIM.

By placing an order with Forza Motor Works, the customer acknowledges and agrees to all terms and conditions contained herein, including all return, exchange, warranty, and limitation-of-liability provisions.

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