{"product_id":"do88-bmw-b58-gen-2-m240i-m340i-m440i-supra-front-mount-heat-exchanger","title":"do88 BMW B58 Gen 2 (M240I\/M340I\/M440I\/Supra) Front Mount Heat Exchanger","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe B58 shares real similarities with the S55 engine found in the F80\/F82 M3\/M4, both use a water-to-air charge cooler paired with a front-positioned heat exchanger (water radiator). This radiator cools the water flowing through the charge air cooler, and that water in turn dissipates heat from the charge air before it enters the engine. The factory charge air cooling system on the B58 is prone to genuinely rapid heat soak under demanding conditions, and high intake air temperatures force the ECU to pull timing or reduce power, leaving enthusiasts with inconsistent results exactly when they don't want them.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003edo88's replacement directly solves this with a \u003cstrong\u003epremium unit delivering 80% more core volume than stock\u003c\/strong\u003e, using a dual-row, 48mm thick design that boosts cooling surface area by \u003cstrong\u003e36%\u003c\/strong\u003e. A quad-pass layout maximises coolant exposure to the core, while a larger 5mm fin height balances the increased cooling capacity with good airflow to the engine radiator positioned behind it. Total fluid capacity increases by \u003cstrong\u003e2.6 litres\u003c\/strong\u003e for genuine thermal buffer under sustained hard use. Installation integrates with OE components including the transmission cooler mounting points and both OE rock guards, keeping things as close to factory as possible elsewhere in the install.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e some trimming of the OE plastic radiator mounting frame is necessary to fit this larger unit (see installation instructions). This is not a pure bolt-on, budget time and basic tools for this step.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e for the G20\/G21 330i and G22\/G23\/G26 430i (B48\/B46 engine), this radiator is only suitable for cars fitted with a water-cooled intercooler.\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=\"mt-2 -mb-1 text-base font-bold\"\u003eWhy Choose This Front Mount Heat Exchanger\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\"\u003e80% larger core volume than the factory unit\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDual-row, 48mm thick core, 36% more cooling surface area\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eQuad-pass layout maximises coolant exposure to the core\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2.6 litre increase in total fluid capacity for genuine thermal buffer\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eIntegrates with OE transmission cooler mounts and both OE rock guards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDirectly addresses the B58's documented heat soak and limp mode risk under demanding driving\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"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\"\u003eToyota GR Supra MK5 (A90\/A91, 2020+, B58\/B48)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G42 M240i\/M240iX (B58)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G20\/G21 M340i\/M340iX (B58)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G20\/G21 330i\/330iX (B48\/B46) - water-cooled intercooler only\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G22\/G23\/G26 M440i\/M440iX (B58)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G22\/G23\/G26 430i\/430iX (B48\/B46) - water-cooled intercooler only\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW G29 Z4 20i\/30i\/M40i (B48\/B46\/B58) - water-cooled intercooler only for 20i\/30i\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eInstallation note:\u003c\/strong\u003e requires trimming of the OE plastic radiator mounting frame. See installation instructions for details.\u003c\/p\u003e","brand":"do88","offers":[{"title":"Default Title","offer_id":54462618403149,"sku":"WC-400","price":764.75,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/4808\/2253\/files\/do88_BMW_B58_Gen_2_M240I_M340I_M440I_Supra_Front_Mount_Heat_Exchanger.webp?v=1786350037","url":"https:\/\/i6tuning.com\/products\/do88-bmw-b58-gen-2-m240i-m340i-m440i-supra-front-mount-heat-exchanger","provider":"i6 Tuning","version":"1.0","type":"link"}