{"product_id":"mosselman-bmw-e82-e88-single-to-twin-oil-cooler-kit-extension-135i-1m","title":"Mosselman Single-to-Twin Oil Cooler Extension Kit – BMW E82\/E88 135i \u0026 1M (N54\/N55) – Setrab 19-Row – OCE8X.N5X.3","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \n  \u003ch2\u003eMosselman Dual Oil Cooler Conversion for BMW 1 Series E8x\u003c\/h2\u003e\n  \u003cp\u003ePart number: \u003cstrong\u003eOCE8X.N5X.3\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003cp\u003eUnlock dependable oil temperature control on your E8x with this Mosselman dual-cooler extension. Designed for the 1 Series coupe and cabriolet, including 135i and 1M models with the twin-turbo straight-six, this package adds a second high-efficiency cooler on the opposite side to the factory unit. The result is greater cooling headroom, stable temps during hard driving, and peace of mind on hot days and track sessions.\u003c\/p\u003e\n  \n  \u003cp\u003eBuilt around a genuine Setrab nineteen-row core and robust Mosselman brackets and hoses, this conversion is a proven upgrade for enthusiasts who want a durable, motorsport-grade oil cooling solution. We have run this kit on our own cars and customer builds and feedback has been consistently positive.\u003c\/p\u003e\n  \n  \u003ch3\u003eWhy enthusiasts choose this kit\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDual oil radiator layout for increased thermal capacity and balanced cooling\u003c\/li\u003e\n    \u003cli\u003eSetrab heat exchanger known for efficiency, flow and reliability\u003c\/li\u003e\n    \u003cli\u003eExcellent for spirited road use and track days in high ambient temperatures\u003c\/li\u003e\n    \u003cli\u003eEngineered hardware for a neat, secure and long-lasting installation\u003c\/li\u003e\n    \u003cli\u003eIdeal supporting mod for tuned N54 and N55 cars that see extended load\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003eSearch intent covered: BMW 1 Series oil radiator upgrade, E8x dual oil cooler conversion, 135i oil temperature solution, 1M oil cooling kit, N54 performance cooling, N55 oil cooling upgrade, E82 E88 oil cooler lines and brackets, Setrab oil cooler pack, track day oil cooler, heat management for tuned BMWs.\u003c\/p\u003e\n  \n  \u003ch3\u003eWhat you receive\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Setrab 19 row oil cooler\u003c\/li\u003e\n    \u003cli\u003e1 x Pre-assembled stainless bracket for the left side\u003c\/li\u003e\n    \u003cli\u003e1 x Complete mounting bracket set for the left cooler\u003c\/li\u003e\n    \u003cli\u003e1 x Hose kit specific to the E8x twin cooler conversion\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eVehicle suitability\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW 1 Series 135i E82 E88 with N54\u003c\/li\u003e\n    \u003cli\u003eBMW 1 Series 135i E82 E88 with N55\u003c\/li\u003e\n    \u003cli\u003eBMW 1 Series 1M E82 with N54\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003cp\u003eCommon searches: E8X oil cooler upgrade, BMW 135i dual cooler kit, 1M auxiliary oil cooler, E82 E88 performance cooling, N54 oil radiator, N55 track cooling, Setrab cooler for BMW, twin cooler add-on, oil temp stability, overheating prevention for fast road and circuit use.\u003c\/p\u003e\n  \n  \u003ch3\u003eInstallation notes\u003c\/h3\u003e\n  \u003cp\u003eThis is not a simple plug-in. Some trimming and additional OEM ducting are required to position the extra cooler and ensure proper airflow.\u003c\/p\u003e\n  \u003cp\u003eAdditional BMW parts typically required:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eFront air duct for the left-hand cooler\u003c\/li\u003e\n    \u003cli\u003eLeft wheel arch air duct\u003c\/li\u003e\n    \u003cli\u003eInner wheel arch liner for the auxiliary cooler on the left\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e1M specific note: The 1M has an auxiliary water radiator on the left, which occupies the location for the second oil cooler. To run a twin setup, that water cooler must be removed and a larger main radiator may be required. Allow extra labour time for 1M fitment.\u003c\/p\u003e\n  \n  \u003ch3\u003eProfessional fitting\u003c\/h3\u003e\n  \u003cp\u003eWant it done properly first time? Book installation with MJ Modifications in Warwickshire. Request a fitting quote at \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\u003c\/p\u003e\n  \n  \u003ch3\u003eCompatibility check before dispatch\u003c\/h3\u003e\n  \u003cp\u003eWe verify suitability before shipping. Please add your UK registration or the last 7 of your VIN at checkout so we can confirm this Mosselman dual cooler extension is correct for your vehicle.\u003c\/p\u003e\n  \n  \u003ch3\u003eBuilt for hot weather and hard use\u003c\/h3\u003e\n  \u003cp\u003eIf you drive your E8x hard, this twin-cooler conversion delivers consistent oil temperature control and confidence lap after lap. A smart addition for performance-focused builds where reliability matters.\u003c\/p\u003e\n  \n\u003c\/div\u003e","brand":"Mosselman","offers":[{"title":"Default Title","offer_id":56008735588738,"sku":null,"price":509.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/MosselmanBMWE82E88SingleToTwinOilCoolerKitExtension_135i_1M_-1_1946x_1f77105a-61f4-4370-97e5-2cc45c236fff.jpg?v=1764091568","url":"https:\/\/mjmodifications.co.uk\/products\/mosselman-bmw-e82-e88-single-to-twin-oil-cooler-kit-extension-135i-1m","provider":"MJ Modifications","version":"1.0","type":"link"}