{"product_id":"2025-2027-bmw-m5-m-performance-style-carbon-fiber-rear-diffuser-g90-g99","title":"2025-2027 BMW M5 M Performance Style Carbon Fiber Rear Diffuser (G90, G99)","description":"\u003cp\u003eThe M5's rear diffuser is the busiest shape on the back of the car, and from the factory it's painted plastic sitting under four exhaust tips that aren't.\u003c\/p\u003e\n\u003cp\u003eThis is an \u003cstrong\u003eM Performance style\u003c\/strong\u003e diffuser built from \u003cstrong\u003eautoclaved 2x2 pre-preg dry carbon fiber\u003c\/strong\u003e — it follows the M Performance design rather than the standard factory part, and fits as a direct OE replacement: same exhaust cutouts, same mounting points, same hardware. The shape you'd pay BMW's options-list price for, in real dry carbon.\u003c\/p\u003e\n\u003cp\u003ePairs with the \u003ca href=\"\/products\/2025-2027-bmw-m5-carbon-fiber-side-skirts-g90-g99\"\u003eCarbon Fiber Side Skirts\u003c\/a\u003e to carry carbon along the lower line of the car. Included in the \u003ca href=\"\/products\/2025-2027-bmw-m5-carbon-fiber-aero-bundle-g90-g99\"\u003eCarbon Fiber Aero Bundle\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhy Autoclave Pre-Preg Dry Carbon Fiber\u003c\/h2\u003e\n\u003cp\u003ePre-preg carbon arrives with the resin already impregnated into the weave at a controlled ratio, so no resin is added by hand during layup — that is what makes it dry carbon. Curing it under heat and pressure in an autoclave consolidates the laminate and drives out trapped air that would otherwise show as flaws in the finished surface. Other processes introduce the resin at the mold, so the ratio is set during layup rather than before it.\u003c\/p\u003e\n\u003cp\u003eA diffuser is all fins, channels and inside corners. Those are exactly the geometries where hand-laid resin pools and cures thick, and where an autoclaved laminate keeps the weave consistent from the face of a fin down into the valley beside it.\u003c\/p\u003e\n\u003ch2\u003eAvailable Carbon Finishes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGloss (Standard)\u003c\/strong\u003e — our standard high-gloss 2x2 twill weave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatte Carbon\u003c\/strong\u003e — same weave, low-sheen matte finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged Carbon\u003c\/strong\u003e — marbled, high-strength forged carbon pattern\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease note: Matte and Forged Carbon finishes are non-refundable once production has started.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eCurrent Lead Time\u003c\/h2\u003e\n\u003cp\u003eCurrent estimated lead time is approximately \u003cstrong\u003e45-60 business days\u003c\/strong\u003e from order to ship.\u003c\/p\u003e","brand":"Feral Auto","offers":[{"title":"Standard Gloss","offer_id":49318564528372,"sku":"FRL-G9XMPRD","price":1499.99,"currency_code":"USD","in_stock":true},{"title":"Matte Carbon (+$100)","offer_id":49318564561140,"sku":"FRL-G9XMPRD-MTE","price":1599.99,"currency_code":"USD","in_stock":true},{"title":"Forged Carbon (+$300)","offer_id":49318564593908,"sku":"FRL-G9XMPRD-FRG","price":1799.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/6550\/6036\/files\/RearDiffuser.jpg?v=1789141496","url":"https:\/\/feralauto.com\/products\/2025-2027-bmw-m5-m-performance-style-carbon-fiber-rear-diffuser-g90-g99","provider":"Feral Auto","version":"1.0","type":"link"}