{"product_id":"girodisc-rear-rotors-porsche","title":"Girodisc 2 Piece Rear Rotors Porsche 981 Boxster \/ Cayman","description":"\u003cp\u003eUpgrade 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 \u003cstrong\u003e298mm to 325mm\u003c\/strong\u003e, 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 \u003cstrong\u003e6061-T6 aluminum center hat\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003ch3\u003eFitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for applicable \u003cstrong\u003ePorsche 981 Cayman \/ Boxster\u003c\/strong\u003e models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for applicable \u003cstrong\u003ePorsche 718 Cayman \/ Boxster\u003c\/strong\u003e models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUpgrades the factory \u003cstrong\u003e298mm rear rotor to 325mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUses the \u003cstrong\u003efactory rear brake calipers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes the required \u003cstrong\u003ecaliper spacers and longer mounting bolts\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned as a direct replacement for the factory rotor system with the supplied caliper-spacing hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify exact model and factory brake configuration before ordering\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e718 GTS 4.0 and 981 Spyder applications use a different GiroDisc rear rotor kit (A2-049B)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncluded\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2 GiroDisc two-piece rear brake rotors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLeft and right 6061-T6 aluminum rotor hats\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLeft and right proprietary cast-iron friction rings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCaliper spacers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLonger caliper mounting bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGiroDisc floating rotor hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eGiroDisc Part Number: \u003cstrong\u003eA2-035\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePosition: \u003cstrong\u003eRear\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQuantity: \u003cstrong\u003eSold as a pair\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRotor Diameter: \u003cstrong\u003e325mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFactory Rotor Diameter: \u003cstrong\u003e298mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRotor Design: \u003cstrong\u003e2-piece floating\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFriction Ring Material: \u003cstrong\u003eGiroDisc proprietary cast iron\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHat Material: \u003cstrong\u003eU.S.-sourced 6061-T6 aircraft-specification aluminum\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInternal Vane Design: \u003cstrong\u003eCurved directional cooling vanes\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFloating Hardware: \u003cstrong\u003e10 high-strength alloy-steel drive pins per rotor\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDrive Pin Finish: \u003cstrong\u003eCadmium plated\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFasteners: \u003cstrong\u003eClass 12.9 cap screws with hardened washers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAnti-Noise Hardware: \u003cstrong\u003eSpring washers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplacement Ring Set: \u003cstrong\u003eD2-035\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLarger \u003cstrong\u003e325mm rotor diameter\u003c\/strong\u003e provides increased braking leverage and cooling capacity compared with the factory 298mm rear rotor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTwo-piece construction combines \u003cstrong\u003elightweight aluminum hats with replaceable cast-iron friction rings\u003c\/strong\u003e for a durable, serviceable performance brake solution\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRacing-derived \u003cstrong\u003ecurved internal vanes\u003c\/strong\u003e act as a centrifugal pump to force cooling air through the rotor during operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGiroDisc's \u003cstrong\u003e10-pin floating system\u003c\/strong\u003e allows axial and radial movement between the hat and friction ring as temperatures change\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAnti-noise spring washers reduce the cold rattle commonly associated with fully floating rotors while still allowing proper thermal expansion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncluded \u003cstrong\u003ecaliper spacers and longer bolts\u003c\/strong\u003e allow the larger rotors to work with the factory rear calipers without requiring a complete big-brake conversion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GiroDisc","offers":[{"title":"Default Title","offer_id":53178740932928,"sku":"GIRA2-035","price":1250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/7587\/4624\/files\/408mm72v__44566.webp?v=1789687831","url":"https:\/\/www.forzamotorworks.com\/products\/girodisc-rear-rotors-porsche","provider":"Forza Motor Works","version":"1.0","type":"link"}