{"product_id":"dinan-bmw-m3-m4-g80-g82-g83-carbon-fiber-rear-diffuser-surround","title":"Dinan Carbon Fiber Rear Diffuser Surround - BMW G8X M3 \/ M4 2021-2026","description":"\u003cp\u003e\u003cbr\u003eThe G80 M3 and G82 M4 rear end is already aggressive from the factory. The question isn't whether it needs work, it's where the right intervention is. The answer is the upper diffuser surround, and Dinan found the right way to address it.\u003c\/p\u003e\n\u003cp\u003eRather than replacing the full diffuser assembly and creating clearance problems with aftermarket exhaust configurations, Dinan designed a carbon fiber accent piece that replaces only the upper surround. The factory gloss black lower diffuser section stays in place. You get carbon fiber where it's most visible without compromising compatibility with the exhaust setup you already have or plan to run.\u003c\/p\u003e\n\u003cp\u003eThe surround is manufactured from 2x2 gloss twill pre-preg dry carbon fiber. Pre-preg construction achieves higher fiber-to-resin ratios than wet lay-up processes, producing a part that is lighter, stiffer, and more dimensionally consistent. A UV-protective clear coat over the weave prevents fading and surface degradation over time.\u003c\/p\u003e\n\u003cp\u003eMounting uses the factory tabs already built into the car. No drilling, no adhesive, no modification. The surround installs the way a factory part would, because it was designed around the factory mounting interface.\u003c\/p\u003e\n\u003cp\u003ePaired with Dinan's Rear Side Splitters, the two pieces combine to create a cohesive full rear diffuser look: elevated over stock, restrained enough to complement the factory design, and clearly executed in real carbon fiber rather than vinyl wrap or hydrodip.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2x2 gloss twill pre-preg dry carbon fiber construction for high strength-to-weight ratio and crisp weave definition\u003c\/li\u003e\n\u003cli\u003eReplaces the upper diffuser surround only, retaining the factory gloss black lower section for exhaust compatibility\u003c\/li\u003e\n\u003cli\u003eUV-protective clear coat preserves gloss finish and prevents carbon fiber degradation\u003c\/li\u003e\n\u003cli\u003eMounts directly to factory tabs, no drilling or adhesive required\u003c\/li\u003e\n\u003cli\u003eDesigned to pair with Dinan Rear Side Splitters to complete the full rear aero look\u003c\/li\u003e\n\u003cli\u003eOEM+ fitment and finish quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFitment confirmed for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBMW M3 \/ G80 (2021-2026): Base, Competition, Competition xDrive\u003c\/li\u003e\n\u003cli\u003eBMW M4 \/ G82 (2021-2026): Base, Competition, Competition xDrive\u003c\/li\u003e\n\u003cli\u003eBMW M4 \/ G82 (2023): CSL\u003c\/li\u003e\n\u003cli\u003eBMW M4 Convertible \/ G83 (2021-2026): Base, Competition, Competition xDrive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStraightforward bolt-on installation using factory mounting points. No modification to the vehicle required. Handle with care during installation to protect the carbon fiber surface.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eClean and dry the factory lower diffuser section and surrounding area\u003c\/li\u003e\n\u003cli\u003eAlign the Dinan carbon surround with the factory mounting tabs\u003c\/li\u003e\n\u003cli\u003eSecure using the factory tab mounting points and supplied hardware\u003c\/li\u003e\n\u003cli\u003eInspect alignment and fitment before driving\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":51343802958070,"sku":"DNND980-0049","price":949.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2674\/6278\/files\/b909ce896ecf1cb0b5c8ed7491720af7L.jpg?v=1785192496","url":"https:\/\/autotecknic.com\/products\/dinan-bmw-m3-m4-g80-g82-g83-carbon-fiber-rear-diffuser-surround","provider":"AutoTecknic USA","version":"1.0","type":"link"}