{"product_id":"csf-bmw-135i-e8x-335i-e9x-1m-e82-n54-racing-radiator","title":"CSF BMW 135I (E8X) \/ 335I (E9X) \/ 1M (E82) N54 Racing Radiator","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe factory radiator on N54-powered 135i, 335i, and 1M models relies on plastic end tanks and connections - a genuine weak point, especially on track cars where sustained heat makes the plastic brittle and prone to cracking and leaking over time. CSF's All-Aluminum Racing Radiator eliminates that weakness entirely, replacing the factory design with a fully aluminium core and construction throughout.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eAt the heart of the design is CSF's exclusive B-Tube technology - rather than a single oval radiator tube, CSF uses two tubes shaped like a \"B\" for genuinely more surface area and greater strength, while allowing for a thinner, lighter, more thermally efficient material than a conventional single-tube design. The core is paired with 6.5mm tall, ultra-efficient multi-louvered fins for maximum surface area contact, and CNC-machined quick-connect inlet\/outlet fittings maintain a precise seal. Every unit is individually leak tested and receives a 30-point inspection before shipping.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003ePlease select your transmission type at checkout:\u003c\/strong\u003e available as \u003cstrong\u003e#7045 (manual transmission)\u003c\/strong\u003e or \u003cstrong\u003e#7046 (automatic\/DCT)\u003c\/strong\u003e - these are separate, non-interchangeable radiators, so selecting the correct one is essential.\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\"\u003e\n\u003cstrong\u003eCSF's exclusive B-Tube core technology\u003c\/strong\u003e - more surface area and strength than a conventional single-tube design\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eEliminates plastic end tanks and connections\u003c\/strong\u003e - addresses the factory design's main failure point\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e6.5mm multi-louvered fins\u003c\/strong\u003e - maximised surface area for efficient heat rejection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCNC-machined quick-connect fittings\u003c\/strong\u003e - precise, secure seal at the inlet\/outlet\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 - uses factory plastic shrouding, hose connections, and mounting points\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eIndividually leak tested with 30-point inspection\u003c\/strong\u003e - genuine quality control before shipping\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 E82 1M (2011, N54, manual transmission - #7045)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW E82\/E88 135i (2008-2011, N54, manual - #7045 \/ automatic - #7046)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBMW E90\/E92\/E93 335i\/335xi (2007-2011, N54, manual - #7045 \/ automatic - #7046)\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\u003eFitment note:\u003c\/strong\u003e the thicker core tightens tolerances slightly between the expansion tank and accessory belt — not a fitment issue, but worth being aware of during installation.\u003c\/p\u003e","brand":"CSF","offers":[{"title":"Default Title","offer_id":54426494271821,"sku":"CSF-7045","price":765.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/4808\/2253\/files\/csf-bmw-135i-e8x-335i-e9x-1m-e82-n54-racing-radiator.webp?v=1785400375","url":"https:\/\/i6tuning.com\/products\/csf-bmw-135i-e8x-335i-e9x-1m-e82-n54-racing-radiator","provider":"Inline6 Tuning","version":"1.0","type":"link"}