{"product_id":"csf-bmw-s58-m2-m3-m4-g87-g80-g81-g82-g83-high-performance-auxiliary-radiator","title":"CSF BMW S58 M2\/M3\/M4 (G87\/G80\/G81\/G82\/G83) High-Performance Auxiliary Radiator","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eImportant - sold individually:\u003c\/strong\u003e every S58-equipped G8X requires \u003cstrong\u003etwo\u003c\/strong\u003e of these auxiliary radiators. This listing is for a single unit; if you need both sides, add a quantity of 2 to your basket.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe S58's cooling system is genuinely complex, consisting of 6 to 7 heat exchangers depending on transmission - and while the factory auxiliary radiators do a decent job in stock form, they start to show real limitations once you add power and push the car in aggressive driving conditions. With many motorsport teams and enthusiasts now pushing well over 1000 horsepower, S58 coolant temperatures can climb high enough to trigger limp mode - ruining a race, track session, or your overall driving fun.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eCSF's High-Performance Auxiliary Radiator directly addresses this with a larger 2-row, 42mm core using CSF's exclusive B-Tube technology - nearly double the width of the OEM's single-row, 34mm core. Ultra-efficient 5mm tall multi-louvered fins maximise surface area contact, and 100% all-aluminium TIG-welded construction eliminates the well-documented weakness of the OEM's plastic tanks and crimp-on gaskets. A genuine practical advantage: the same part fits either the left or right side of the car, and because each side serves a different cooling system (charge air on one side, engine coolant on the other), you can upgrade just one at a time if you want to prioritise based on your build's specific needs. An integrated, bolt-on rock guard protects against road debris puncturing the core - a well-known cause of OEM coolers failing and spilling fluid mid-drive.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWorks with:\u003c\/strong\u003e OEM mounting points and quick-connect fittings - suitable for both manual and ZF8 automatic transmission vehicles.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eWhy Choose This Auxiliary Radiator\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e2-row, 42mm core\u003c\/strong\u003e - nearly double the width of the OEM's single-row, 34mm design\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCSF's exclusive B-Tube technology\u003c\/strong\u003e - genuine increase in heat dissipation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e100% all-aluminium TIG-welded construction\u003c\/strong\u003e - eliminates the OEM's weak plastic tanks and crimp-on gaskets\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eSame part fits either side\u003c\/strong\u003e - genuine flexibility to upgrade one side at a time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eIntegrated bolt-on rock guard\u003c\/strong\u003e - protects against road debris damage\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eTrue drop-in fit\u003c\/strong\u003e - OEM mounting points and quick-connect fittings, no modification required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eCompatibility\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G87 M2 (2023+, S58, manual \u0026amp; ZF8 automatic)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G80 M3 Saloon (2021+, S58, manual \u0026amp; ZF8 automatic)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G81 M3 Touring (2022+, S58, manual \u0026amp; ZF8 automatic)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G82 M4 Coupe (2021+, S58, manual \u0026amp; ZF8 automatic)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G83 M4 Convertible (2021+, S58, manual \u0026amp; ZF8 automatic)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eSold individually\u003c\/strong\u003e - order quantity 2 for a full left and right set\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003ePart Number\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCSF #8321, replaces OEM part #17118095285\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CSF","offers":[{"title":"Default Title","offer_id":54428388917581,"sku":"CSF-8321","price":649.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/4808\/2253\/files\/csf-bmw-s58-m2-m3-m4-g87-g80-g81-g82-g83-high-performance-auxiliary-radiator.webp?v=1785420118","url":"https:\/\/i6tuning.com\/products\/csf-bmw-s58-m2-m3-m4-g87-g80-g81-g82-g83-high-performance-auxiliary-radiator","provider":"Inline6 Tuning","version":"1.0","type":"link"}