{"product_id":"csf-auxiliary-radiator-bmw-g8x-m3-m4-m2-8321","title":"CSF Auxiliary Radiator — 2021-2026 BMW G8X M3, M4 \u0026 M2 | S58, 2-Row 42mm | 8321","description":"\u003cp\u003eThe CSF 8321 is a high-performance auxiliary radiator for the 2021-2026 BMW G80\/G81 M3 and G82\/G83 M4 (all trims, including Competition, Competition xDrive, CS, and CSL) and the 2023-2026 G87 M2 with the S58 twin-turbo 3.0L inline-6. It uses a 2-row 42mm core with CSF's B-Tube Technology and seam-brazed construction for about 15 percent more heat-transfer surface, with track-spec 5mm multi-louvered fins, 100 percent all-aluminum TIG-welded tanks, and aluminum mounting pins. It has a satin black finish, OEM-style quick-connect inlet and outlet, and a detachable rock guard. It is a drop-in fit and is sold individually; each car requires two, one per side.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eType: high-performance auxiliary radiator\u003c\/li\u003e\n\u003cli\u003eCore: 2-row 42mm, B-Tube Technology (about 15 percent more surface)\u003c\/li\u003e\n\u003cli\u003eFins: track-spec 5mm multi-louvered\u003c\/li\u003e\n\u003cli\u003eConstruction: 100 percent all-aluminum TIG-welded, aluminum mounting pins\u003c\/li\u003e\n\u003cli\u003eEngine: S58 twin-turbo 3.0L inline-6\u003c\/li\u003e\n\u003cli\u003eFinish: satin black; detachable rock guard included\u003c\/li\u003e\n\u003cli\u003eSold: individually, two required per car\u003c\/li\u003e\n\u003cli\u003eFitment: drop-in, no modifications\u003c\/li\u003e\n\u003cli\u003ePart number: 8321\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVehicle Applications\u003c\/h3\u003e\u003cp\u003eDirect fit on the following (S58 twin-turbo, two required per car):\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2021 BMW M3 (G80\/G81)\u003c\/li\u003e\n\u003cli\u003e2022 BMW M3 (G80\/G81)\u003c\/li\u003e\n\u003cli\u003e2023 BMW M3 (G80\/G81)\u003c\/li\u003e\n\u003cli\u003e2024 BMW M3 (G80\/G81)\u003c\/li\u003e\n\u003cli\u003e2025 BMW M3 (G80\/G81)\u003c\/li\u003e\n\u003cli\u003e2026 BMW M3 (G80\/G81)\u003c\/li\u003e\n\u003cli\u003e2021 BMW M4 (G82\/G83)\u003c\/li\u003e\n\u003cli\u003e2022 BMW M4 (G82\/G83)\u003c\/li\u003e\n\u003cli\u003e2023 BMW M4 (G82\/G83)\u003c\/li\u003e\n\u003cli\u003e2024 BMW M4 (G82\/G83)\u003c\/li\u003e\n\u003cli\u003e2025 BMW M4 (G82\/G83)\u003c\/li\u003e\n\u003cli\u003e2026 BMW M4 (G82\/G83)\u003c\/li\u003e\n\u003cli\u003e2023 BMW M2 (G87)\u003c\/li\u003e\n\u003cli\u003e2024 BMW M2 (G87)\u003c\/li\u003e\n\u003cli\u003e2025 BMW M2 (G87)\u003c\/li\u003e\n\u003cli\u003e2026 BMW M2 (G87)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch5\u003eWhat vehicles does the CSF 8321 fit?\u003c\/h5\u003e\u003cp\u003eThe 2021-2026 BMW G8X M3 and M4 (all trims) and the 2023-2026 M2, with the S58 engine.\u003c\/p\u003e\u003ch5\u003eHow many are needed per car?\u003c\/h5\u003e\u003cp\u003eTwo are required per vehicle, one per side. It is sold individually.\u003c\/p\u003e\u003ch5\u003eHow is the core built?\u003c\/h5\u003e\u003cp\u003eA 2-row 42mm B-Tube core with about 15 percent more heat-transfer surface than OEM.\u003c\/p\u003e\u003ch5\u003eIs it a drop-in fit?\u003c\/h5\u003e\u003cp\u003eYes. It uses OEM-style quick-connect connections and includes a detachable rock guard.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What vehicles does the CSF 8321 fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 2021-2026 BMW G8X M3 and M4 (all trims) and the 2023-2026 M2, with the S58 engine.\"}}, {\"@type\": \"Question\", \"name\": \"How many are needed per car?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Two are required per vehicle, one per side. It is sold individually.\"}}, {\"@type\": \"Question\", \"name\": \"How is the core built?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A 2-row 42mm B-Tube core with about 15 percent more heat-transfer surface than OEM.\"}}, {\"@type\": \"Question\", \"name\": \"Is it a drop-in fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. It uses OEM-style quick-connect connections and includes a detachable rock guard.\"}}]}\u003c\/script\u003e","brand":"CSF","offers":[{"title":"Default Title","offer_id":42636395380784,"sku":"CSF8321","price":485.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/0098ba618d8b6e444c89c66041692874L.jpg?v=1765305358","url":"https:\/\/berryperformancesales.com\/products\/csf-auxiliary-radiator-bmw-g8x-m3-m4-m2-8321","provider":"Berry Performance Sales","version":"1.0","type":"link"}