{"product_id":"zimmermann-formula-z-rear-brake-discs-380x30mm-porsche-718-gt4","title":"Zimmermann Formula Z Rear Brake Discs 380x30mm – Porsche 718 GT4","description":"\u003cp\u003e\u003cstrong\u003eZimmermann Formula Z Rear Brake Discs 380x30mm – Porsche 718 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 – 9GT615601FZIM:\u003c\/strong\u003e In stock – 24-hour dispatch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight – 9GT615602FZIM:\u003c\/strong\u003e In stock – 24-hour dispatch\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 Formula Z two-piece, vented and perforated 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 718 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\u003cli\u003eNot suitable for PCCB-equipped vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat is supplied\u003c\/h3\u003e\u003cp\u003eOne 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\u003eAbout Zimmermann Formula Z\u003c\/h3\u003e\u003cp\u003eZimmermann Formula Z brake discs are developed as premium two-piece direct replacements for high-performance applications. The separate friction ring and centre bell are designed to manage heat and expansion while retaining the correct factory mounting dimensions.\u003c\/p\u003e\u003cp\u003eThe vented and perforated friction surface supports heat evacuation and pad-gas release during repeated braking. The two-piece layout also helps limit heat transfer into the hub area and can reduce unnecessary rotating mass compared with a comparable one-piece design.\u003c\/p\u003e\u003cp\u003eFormula Z discs are intended to provide a high-quality road and fast-road replacement while preserving the correct ABS, caliper and wheel-clearance relationships of the original brake system.\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\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":"Zimmermann","offers":[{"title":"Left","offer_id":65364299907421,"sku":"9GT615601FZIM","price":523.14,"currency_code":"GBP","in_stock":true},{"title":"Right","offer_id":65364299940189,"sku":"9GT615602FZIM","price":523.14,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/0411\/2989\/files\/98135240881FZIM_1.jpg?v=1785061197","url":"https:\/\/nineteen72performance.co.uk\/products\/zimmermann-formula-z-rear-brake-discs-380x30mm-porsche-718-gt4","provider":"Nineteen72 Performance","version":"1.0","type":"link"}