{"product_id":"shw-performance-front-brake-discs-380x34mm-porsche-991-gt3-rs","title":"SHW Performance Front Brake Discs 380x34mm – Porsche 991 GT3\/RS","description":"\u003cp\u003e\u003cstrong\u003eSHW Performance Front Brake Discs 380x34mm – Porsche 991 GT3\/RS\u003c\/strong\u003e is a direct-replacement front 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 – 99135140582SHW:\u003c\/strong\u003e Orderable – Confirm current lead time before sale\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight – 99135140682SHW:\u003c\/strong\u003e Orderable – Confirm current lead time before sale\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 34 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Internally vented two-piece performance brake disc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Front\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePorsche 911 (991.1) GT3 – front axle\u003c\/li\u003e\n\u003cli\u003ePorsche 911 (991.1) GT3 RS – front axle\u003c\/li\u003e\n\u003cli\u003eCars fitted with the original 380 x 34 mm steel front brake system\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 SHW Performance\u003c\/h3\u003e\u003cp\u003eSHW is a major brake-disc manufacturer with extensive original-equipment experience. Its replacement range is developed around the principle of supplying a genuine factory-equivalent component rather than a loosely adapted universal rotor.\u003c\/p\u003e\u003cp\u003eThis application uses a two-piece performance construction, allowing the friction ring and centre section to manage thermal expansion more effectively than a conventional one-piece disc.\u003c\/p\u003e\u003cp\u003eAcross its wider range, SHW manufactures both ventilated monoblock rotors and patented two-piece pin-drive systems. Where the vehicle specification calls for a floating two-piece rotor, the friction ring is connected to an aluminium bell through stainless-steel pins. This arrangement can reduce rotating and unsprung mass, allow the friction ring to expand more freely under temperature and improve cooling airflow through the internal vanes.\u003c\/p\u003e\u003cp\u003eSHW places particular emphasis on repeatable braking performance, thermal stability, durability and noise control. Curved internal vane designs are used where specified to balance structural strength with efficient heat evacuation. The result is a direct-replacement product designed for consistent performance under repeated braking loads.\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\u003e99135140581\u003c\/li\u003e\n\u003cli\u003e99135140681\u003c\/li\u003e\n\u003cli\u003e99135140582\u003c\/li\u003e\n\u003cli\u003e99135140682\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":"SHW Performance","offers":[{"title":"Left","offer_id":65364300071261,"sku":"99135140582SHW","price":791.0,"currency_code":"GBP","in_stock":true},{"title":"Right","offer_id":65364300104029,"sku":"99135140682SHW","price":791.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/0411\/2989\/files\/99135140681SHW_1_33e2214c-4f58-472b-b599-8eb9a5abed7f.jpg?v=1785061198","url":"https:\/\/nineteen72performance.co.uk\/products\/shw-performance-front-brake-discs-380x34mm-porsche-991-gt3-rs","provider":"Nineteen72 Performance","version":"1.0","type":"link"}