{"product_id":"csf-ford-focus-st-mk3-high-performance-radiator","title":"CSF Ford Focus ST (MK3) High-Performance Radiator","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe MK3 Focus ST built a genuine cult following thanks to its good looks, nimble chassis, and capable 2.0L EcoBoost engine, and remains popular today as both a hot-hatch daily driver and a weekend track car. It was well engineered and performed admirably out of the box, but a few upgrades, or simply hard driving on track or in hot climates, can quickly lead to real heat issues. This radiator was developed specifically to solve that.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe factory radiator uses a plastic tank with a single-row aluminium core, standard for the average customer but not the best option for high-horsepower builds or hard driving, and turbo cars run hot, the 2.0L EcoBoost is no exception. CSF's 1-row, 31mm core uses their exclusive B-Tube technology, a specially engineered \"B\"-shaped tube carefully formed and brazed over the seam, increasing heat transfer surface area by approximately 15% over regular tubes for genuine dual liquid laminar flow, while allowing for thinner, lighter aluminium construction that's actually stronger than a normal welded design. One of the biggest advantages over the OE unit is the genuine triple-pass design, internal routing forces coolant to flow through the core three times rather than once, maximising heat dissipation for the lowest possible outlet temperatures and more even heat dissipation throughout, reducing hotspots and promoting more consistent cooling. 6.5mm tall, multi-louvered fins maximise airflow through the core, and 100% TIG-welded, all-aluminium construction increases overall strength and durability considerably over the factory design.\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 hose connections. True drop-in fit.\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 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\"\u003eGenuine triple-pass flow structure, coolant crosses the core three times for the lowest outlet temperature\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCSF's exclusive B-Tube core technology, approximately 15% more heat transfer than regular tubes\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMore even heat dissipation throughout the core, reducing hotspots versus the OEM design\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e100% TIG-welded, all-aluminium construction, a genuine strength upgrade over the factory unit\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDeveloped specifically to address reported coolant temperature issues on this platform\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTrue drop-in fit, no modifications 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\"\u003eFord Focus ST (MK3, 2013-2018, 2.0L EcoBoost)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eAlso available:\u003c\/strong\u003e CSF's larger 2-Row 42mm Triple-Pass Radiator (#7239) for the related Focus RS, which has higher cooling demands, sold separately.\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 #7238, replaces OEM part CV6Z-8005U (supersedes CV6Z-8005T)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CSF","offers":[{"title":"Default Title","offer_id":54448782147917,"sku":"CSF-7238","price":819.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/4808\/2253\/files\/csf-ford-focus-st-mk3-high-performance-radiator.webp?v=1785773096","url":"https:\/\/i6tuning.com\/products\/csf-ford-focus-st-mk3-high-performance-radiator","provider":"i6 Tuning","version":"1.0","type":"link"}