{"product_id":"genuine-porsche-rear-brake-discs-380x30mm-porsche-981-cayman-gt4","title":"Genuine Porsche Rear Brake Discs 380x30mm – Porsche 981 Cayman GT4","description":"\u003cp\u003e\u003cstrong\u003eGenuine Porsche Rear Brake Discs 380x30mm – Porsche 981 Cayman GT4\u003c\/strong\u003e is a direct-replacement rear brake disc for the listed Porsche GT applications. It is intended for vehicles using the stated steel brakes system and retains the original mounting arrangement, caliper position and brake balance.\u003c\/p\u003e\u003cp\u003eBrake discs on Porsche GT models are highly application-specific. Diameter alone is not enough to confirm compatibility: disc thickness, offset, bell depth, handed orientation, brake option and production date must also match.\u003c\/p\u003e\u003cdiv class=\"product-lead-time\"\u003e\n\u003ch3\u003eAvailability and lead time\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeft – 9GT615601F:\u003c\/strong\u003e In stock – 24-hour dispatch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight – 9GT615602F:\u003c\/strong\u003e Orderable – 14–28 days\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eSupplier availability checked 25 July 2026. Lead times are estimates and can change before an order is placed. We will confirm any material change after ordering.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch3\u003eKey specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc diameter:\u003c\/strong\u003e 380 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc thickness:\u003c\/strong\u003e 30 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Genuine Porsche two-piece steel brake disc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Rear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePorsche 981 Cayman GT4 – rear axle\u003c\/li\u003e\n\u003cli\u003eCars fitted with the standard 380 x 30 mm steel rear brake system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat is supplied\u003c\/h3\u003e\u003cp\u003eOne genuine brake disc; select left or right. \u003cstrong\u003eBrake disc rotors are priced individually.\u003c\/strong\u003e Where the product is handed, select the correct left- or right-hand part number. A complete axle replacement normally requires one left disc and one right disc.\u003c\/p\u003e\u003ch3\u003eWhy choose Genuine Porsche?\u003c\/h3\u003e\u003cp\u003eGenuine Porsche braking components are produced to the original vehicle specification, including the correct dimensions, material specification, mounting geometry and compatibility with the factory caliper and electronic wear-monitoring system.\u003c\/p\u003e\u003cp\u003eThey are the preferred choice where maintaining the original braking feel, fit, finish and Porsche parts traceability is the priority. Genuine parts are especially valuable on GT and RS models where different model years, brake options and transmission variants can use visually similar but incompatible components.\u003c\/p\u003e\u003cp\u003eAlways match the Porsche part number against the vehicle VIN or the part removed from the car before ordering.\u003c\/p\u003e\u003ch3\u003eInstallation and compatibility notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConfirm compatibility by VIN, original Porsche part number or the number on the component removed from the vehicle.\u003c\/li\u003e\n\u003cli\u003eCheck whether the car is fitted with conventional steel brakes or Porsche Ceramic Composite Brakes.\u003c\/li\u003e\n\u003cli\u003eInspect the caliper, pad retaining hardware, brake hoses and wear sensors while the brake system is dismantled.\u003c\/li\u003e\n\u003cli\u003eBrake discs must be installed onto clean, corrosion-free hub faces and checked for runout before the vehicle is returned to service.\u003c\/li\u003e\n\u003cli\u003eNew pads and discs require the correct bedding procedure. Avoid prolonged stationary brake application immediately after heavy braking.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is strongly recommended on all GT and RS braking systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRelated and cross-reference numbers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e98135140101\u003c\/li\u003e\n\u003cli\u003e98135140201\u003c\/li\u003e\n\u003cli\u003e9GT615601F\u003c\/li\u003e\n\u003cli\u003e9GT615602F\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eReference numbers are provided for comparison. Porsche may supersede part numbers, so the current number should be checked against the vehicle before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Genuine Porsche","offers":[{"title":"Left","offer_id":65364299776349,"sku":"9GT615601F","price":948.88,"currency_code":"GBP","in_stock":true},{"title":"Right","offer_id":65364299809117,"sku":"9GT615602F","price":948.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/0411\/2989\/files\/9GT615601F_1_11375c9a-3dec-40cb-a391-43d607094430.jpg?v=1785061198","url":"https:\/\/nineteen72performance.co.uk\/products\/genuine-porsche-rear-brake-discs-380x30mm-porsche-981-cayman-gt4","provider":"Nineteen72 Performance","version":"1.0","type":"link"}