Girodisc 2 Piece Rear Rotors Porsche 981 Boxster / Cayman

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