{"id":3999,"date":"2026-08-26T15:23:09","date_gmt":"2026-08-26T15:23:09","guid":{"rendered":"https:\/\/revexaauto.com\/product\/carbon-fiber-rear-undertray-diffuser-bmw-g80-m3-g82-g83-m4\/"},"modified":"2026-08-28T03:42:54","modified_gmt":"2026-08-28T03:42:54","slug":"carbon-fiber-rear-undertray-diffuser-bmw-g80-m3-g82-g83-m4","status":"publish","type":"product","link":"https:\/\/revexaauto.com\/zh\/product\/carbon-fiber-rear-undertray-diffuser-bmw-g80-m3-g82-g83-m4\/","title":{"rendered":"Carbon Fiber Rear Undertray Diffuser &#8211; BMW G80 M3 \/ G82 &amp; G83 M4"},"content":{"rendered":"<p data-start=\"241\" data-end=\"599\">Elevate your G8X M car&#8217;s rear-end aggression and aerodynamic efficiency with this <strong data-start=\"342\" data-end=\"382\">Carbon Fiber Rear Undertray Diffuser<\/strong>, precisely engineered for the <strong data-start=\"413\" data-end=\"427\">BMW G80 M3<\/strong> and <strong data-start=\"432\" data-end=\"446\">G82\/G83 M4<\/strong>. Crafted from premium <strong data-start=\"469\" data-end=\"497\">prepreg dry carbon fiber<\/strong>, this diffuser is not only lightweight and strong but designed to enhance both <strong data-start=\"577\" data-end=\"598\">form and function<\/strong>.<\/p>\n<p data-start=\"601\" data-end=\"942\">The undertray-style design extends beneath the rear bumper and incorporates aggressive vertical fins for optimized airflow control and reduced rear-end lift, especially at higher speeds. It&#8217;s a must-have for any enthusiast looking to complete their carbon aero package or improve track performance with OEM+ fitment and race-inspired design.<\/p>\n<p data-start=\"944\" data-end=\"966\"><strong data-start=\"944\" data-end=\"964\">Vehicle Fitment:<\/strong><\/p>\n<ul data-start=\"967\" data-end=\"1069\">\n<li data-start=\"967\" data-end=\"999\">\n<p data-start=\"969\" data-end=\"999\"><strong data-start=\"969\" data-end=\"997\">2021+ BMW G80 M3 (Sedan)<\/strong><\/p>\n<\/li>\n<li data-start=\"1000\" data-end=\"1032\">\n<p data-start=\"1002\" data-end=\"1032\"><strong data-start=\"1002\" data-end=\"1030\">2021+ BMW G82 M4 (Coupe)<\/strong><\/p>\n<\/li>\n<li data-start=\"1033\" data-end=\"1069\">\n<p data-start=\"1035\" data-end=\"1069\"><strong data-start=\"1035\" data-end=\"1069\">2022+ BMW G83 M4 (Convertible)<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1071\" data-end=\"1090\"><strong data-start=\"1071\" data-end=\"1088\">Key Features:<\/strong><\/p>\n<ul data-start=\"1091\" data-end=\"1603\">\n<li data-start=\"1091\" data-end=\"1167\">\n<p data-start=\"1093\" data-end=\"1167\"><strong data-start=\"1093\" data-end=\"1106\">Material:<\/strong> 100% Prepreg Dry Carbon Fiber (Lightweight &amp; UV-resistant)<\/p>\n<\/li>\n<li data-start=\"1168\" data-end=\"1241\">\n<p data-start=\"1170\" data-end=\"1241\"><strong data-start=\"1170\" data-end=\"1181\">Finish:<\/strong> High Gloss Clear Coat (Matte option available by request)<\/p>\n<\/li>\n<li data-start=\"1242\" data-end=\"1324\">\n<p data-start=\"1244\" data-end=\"1324\"><strong data-start=\"1244\" data-end=\"1255\">Design:<\/strong> Full-length undertray-style diffuser with integrated vertical fins<\/p>\n<\/li>\n<li data-start=\"1325\" data-end=\"1458\">\n<p data-start=\"1327\" data-end=\"1351\"><strong data-start=\"1327\" data-end=\"1349\">Performance Gains:<\/strong><\/p>\n<ul data-start=\"1354\" data-end=\"1458\">\n<li data-start=\"1354\" data-end=\"1389\">\n<p data-start=\"1356\" data-end=\"1389\">Enhanced aerodynamic efficiency<\/p>\n<\/li>\n<li data-start=\"1392\" data-end=\"1423\">\n<p data-start=\"1394\" data-end=\"1423\">Reduced turbulence and drag<\/p>\n<\/li>\n<li data-start=\"1426\" data-end=\"1458\">\n<p data-start=\"1428\" data-end=\"1458\">Increased rear-end stability<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"1459\" data-end=\"1526\">\n<p data-start=\"1461\" data-end=\"1526\"><strong data-start=\"1461\" data-end=\"1482\">Aesthetic Impact:<\/strong> Aggressive motorsport-inspired appearance<\/p>\n<\/li>\n<li data-start=\"1527\" data-end=\"1603\">\n<p data-start=\"1529\" data-end=\"1603\"><strong data-start=\"1529\" data-end=\"1546\">Installation:<\/strong> Direct bolt-on (mounts to OEM points; hardware included)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1605\" data-end=\"1909\"><strong data-start=\"1605\" data-end=\"1626\">Why It&#8217;s Special:<\/strong><br data-start=\"1626\" data-end=\"1629\">This rear undertray diffuser fills the rear lower valance with a high-performance look that complements other carbon upgrades like side skirts, front splitters, and trunk spoilers. It integrates seamlessly and maintains OEM fitment tolerances for a clean, factory-plus appearance.<\/p>\n<p data-start=\"1605\" data-end=\"1909\">Note:<\/p>\n<p data-start=\"1605\" data-end=\"1909\">Grey Vehicle test car ( not finished Product)<\/p>\n<p data-start=\"1911\" data-end=\"1934\"><strong data-start=\"1911\" data-end=\"1932\">Package Includes:<\/strong><\/p>\n<ul data-start=\"1935\" data-end=\"2072\">\n<li data-start=\"1935\" data-end=\"1975\">\n<p data-start=\"1937\" data-end=\"1975\">Carbon fiber rear undertray diffuser<\/p>\n<\/li>\n<li data-start=\"1976\" data-end=\"2008\">\n<p data-start=\"1978\" data-end=\"2008\">Mounting hardware &amp; brackets<\/p>\n<\/li>\n<li data-start=\"2009\" data-end=\"2072\">\n<p data-start=\"2011\" data-end=\"2072\">Optional: Professional install recommended for best alignment<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2074\" data-end=\"2077\">\n<p data-start=\"2079\" data-end=\"2254\" data-is-last-node=\"\" data-is-only-node=\"\">Let me know if you&#8217;d like to bundle this with a <strong data-start=\"2127\" data-end=\"2151\">carbon rear diffuser<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Elevate your G8X M car&#8217;s rear-end aggression and aerodynamic efficiency with this Carbon Fiber Rear Undertray Diffuser, precisely engineered for the BMW G80 M3 and G82\/G83 M4. Crafted from premium prepreg dry carbon fiber, this diffuser is not only lightweight and strong but designed to enhance both form and function. The undertray-style design extends beneath [&hellip;]<\/p>\n","protected":false},"featured_media":12986,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[139],"product_cat":[102,21,39,132],"product_tag":[],"class_list":["post-3999","product","type-product","status-publish","has-post-thumbnail","product_brand-bmw","product_cat-bmw","product_cat-carbon-fiber-parts","product_cat-exterior","product_cat-rear-diffusers","pa_color-black","pa_make-bmw","pa_material-carbon-fiber","pa_vehicle-model-g80","pa_vehicle-model-g82","pa_vehicle-model-g83","pa_vehicle-model-m3","first","instock","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4-RC2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Carbon Fiber Rear Undertray Diffuser - BMW G80 M3 \/ G82 &amp; G83 M4 | RevexaAuto<\/title>\n<meta name=\"description\" content=\"Shop Carbon Fiber Rear Undertray Diffuser - BMW G80 M3 \/ G82 &amp; G83 M4. 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