{"product_id":"carbon-fiber-s3-car-rear-diffuser-for-audi-s3-8y-a3-sline-sedan-4-door-2021-2023","title":"Audi S3 8Y \/ A3 S-Line Sedan Carbon Fiber Rear Bumper Diffuser 2021 - 2023","description":"\u003cp\u003e\nTransform the rear end of your Audi S3 8Y or A3 S-Line Sedan with this genuine carbon fiber rear bumper diffuser, precision manufactured using a 3D design, CNC milling, and full autoclave curing process. Designed specifically for the S3 8Y factory rear bumper, this diffuser adds a wider, more aggressive lower rear profile that visually lowers the stance and introduces a more purposeful, performance-oriented rear appearance. The polished and UV-protected carbon fiber surface maintains the deep gloss carbon weave finish over long-term outdoor and driving exposure without fading or surface degradation. Self-tapping screws are included for a secure, rattle-free fitment directly to the factory S3 8Y rear bumper with no adhesive tape required.\n\u003c\/p\u003e\n\n\u003ch6\u003eFeatures:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine carbon fiber construction – autoclave cured using 3D design and CNC milling for precise diffuser geometry, consistent panel quality, and high structural integrity\u003c\/li\u003e\n\u003cli\u003ePolished and UV-protected surface finish – maintains the deep gloss carbon weave appearance over sustained outdoor and driving exposure without fading or yellowing\u003c\/li\u003e\n\u003cli\u003ePurpose-designed S3 8Y rear bumper diffuser profile – adds width and aggression to the lower rear bumper for a more planted and performance-oriented rear stance\u003c\/li\u003e\n\u003cli\u003eSelf-tapping screws included for a secure, rattle-free fitment to the factory S3 8Y rear bumper\u003c\/li\u003e\n\u003cli\u003eLightweight at 1.15kg – minimal weight addition to the rear of the vehicle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eSpecifications:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eCondition: 100% Brand New\u003c\/li\u003e\n\u003cli\u003eType: Rear Bumper Diffuser\u003c\/li\u003e\n\u003cli\u003eMaterial: Genuine Carbon Fiber\u003c\/li\u003e\n\u003cli\u003eSurface Finish: Polished \u0026amp; UV Protected\u003c\/li\u003e\n\u003cli\u003eManufacturing Process: 3D Design · CNC Milling · Autoclave Cured\u003c\/li\u003e\n\u003cli\u003eDimensions: 139 x 31 x 15 cm\u003c\/li\u003e\n\u003cli\u003eWeight: 1.15 kg\u003c\/li\u003e\n\u003cli\u003eInstallation Method: Self-Tapping Screws (included)\u003c\/li\u003e\n\u003cli\u003eFitment: S3 8Y Factory Rear Bumper Only\u003c\/li\u003e\n\u003cli\u003ePurpose: Retrofit \/ Upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eFitment:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eAudi S3 8Y Sedan 4-Door (2021–2023)\u003c\/li\u003e\n\u003cli\u003eAudi A3 8Y S-Line Sedan 4-Door (2021–2023)\u003c\/li\u003e\n\u003cli\u003eCompatible with S3 8Y factory rear bumper only – not compatible with aftermarket or non-S3 bumper configurations\u003c\/li\u003e\n\u003cli\u003eSedan 4-door body style only – not confirmed for Sportback variants\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eContents:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e1x Carbon Fiber Rear Bumper Diffuser\u003c\/li\u003e\n\u003cli\u003eSelf-Tapping Screws for installation included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eBenefits:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine autoclave carbon fiber delivers an authentic carbon weave appearance and superior strength-to-weight ratio over carbon-look ABS or fiberglass alternatives\u003c\/li\u003e\n\u003cli\u003eUV-protected polished finish maintains the premium carbon surface appearance over prolonged outdoor and driving exposure without fading or yellowing\u003c\/li\u003e\n\u003cli\u003eRear diffuser profile adds width and visual aggression to the lower rear of the S3 8Y and A3 S-Line Sedan for a more track-inspired and purposeful exterior stance\u003c\/li\u003e\n\u003cli\u003eSelf-tapping screw fitment provides a more secure and rattle-free installation compared to adhesive tape alternatives\u003c\/li\u003e\n\u003cli\u003eAt 1.15kg, the diffuser adds a comprehensive rear lower bumper upgrade with minimal impact on rear weight distribution\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eInstallation Notes:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eSelf-tapping screws supplied – professional installation recommended to ensure correct diffuser positioning, panel alignment, and a clean finish\u003c\/li\u003e\n\u003cli\u003eCompatible with S3 8Y factory rear bumper only – will not fit aftermarket rear bumpers or non-S3 8Y bumper configurations\u003c\/li\u003e\n\u003cli\u003eSedan 4-door body style only – not confirmed for Sportback body variants\u003c\/li\u003e\n\u003cli\u003eClean and degrease the factory rear bumper surface at the intended fitment locations before installation\u003c\/li\u003e\n\u003cli\u003eIf unsure about compatibility with your specific bumper configuration or variant, contact our team with your year and model before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eShipping Information:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcessing Time:\u003c\/strong\u003e 2-5 business days for warehouse stock items\u003c\/li\u003e \n\u003cli\u003e\n\u003cstrong\u003eMade-to-Order:\u003c\/strong\u003e Please allow 2-4 weeks for shipping if product requires custom manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eWarranty:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e12-month standard warranty from date of purchase\u003c\/li\u003e\n\u003cli\u003eContact our support team for assistance with any issues\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K2 Industries","offers":[{"title":"Default Title","offer_id":45975450681578,"sku":"1600788585634","price":749.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0477\/0427\/7142\/files\/Hfd775caa3537486380a14575d2af89a7Y.webp?v=1775479129","url":"https:\/\/www.k2-industries.com\/en-jp\/products\/carbon-fiber-s3-car-rear-diffuser-for-audi-s3-8y-a3-sline-sedan-4-door-2021-2023","provider":"K2 Industries","version":"1.0","type":"link"}