{"product_id":"maxton-design-bmw-f20-f21-m-power-rear-diffuser-rear-side-splitters-inc-m135i-m140i","title":"Maxton Design BMW 1 Series F20 F21 Pre-LCI Rear Diffuser\/Valance Insert Kit with Rear Spats \u0026 Side Splitters (2011-2015) - Rear Bumper Lip\/Skirt Upgrade - Fits M135i \u0026 M140i","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eBMW 1 Series F20 F21 Pre-LCI Rear Valance Diffuser and Rear Spats Kit by Maxton Design\u003c\/h2\u003e\n  \n  \u003cp\u003eGive the back end of your 1 Series a serious upgrade with this Maxton Design rear valance diffuser and matching rear spats for the F20 and F21 pre-facelift models. Engineered for the 2011 to 2015 3-door and 5-door hatchback, including the M135i and M140i variants, this aero styling pack delivers an aggressive OEM-plus look with everyday usability.\u003c\/p\u003e\n  \n  \u003cp\u003eMade from automotive-grade ABS, the same material commonly used in factory bumpers, this diffuser insert and side extensions offer the ideal blend of strength, flexibility and precise fit. We have installed this kit in-house and customer feedback has been consistently excellent on fitment, finish and the sharper stance it gives the rear of the car.\u003c\/p\u003e\n  \n  \u003ch3\u003eWhy enthusiasts choose this rear aero kit\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eTransforms the rear profile with a wider, lower appearance and performance-led styling.\u003c\/li\u003e\n    \u003cli\u003eABS construction for durability on UK roads - robust, lightweight and built for daily use.\u003c\/li\u003e\n    \u003cli\u003eDesigned specifically for F20 F21 pre-LCI chassis for a clean, accurate fit.\u003c\/li\u003e\n    \u003cli\u003eWorks perfectly on M135i and M140i models for a cohesive M Power look.\u003c\/li\u003e\n    \u003cli\u003eQuick visual win - big aesthetic impact with minimal downtime.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eSEO-friendly search terms customers use\u003c\/h3\u003e\n  \u003cp\u003eBMW 1 Series F20 F21 rear valance, diffuser insert, rear bumper lip, rear skirt, rear spats, rear splitter extensions, hatchback rear aero, F20 5-door diffuser, F21 3-door diffuser, pre-facelift 1er rear styling, M135i M140i rear upgrade, Maxton aero kit, performance body styling for BMW 1er.\u003c\/p\u003e\n  \n  \u003ch3\u003eKey details\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eMaterial: High-quality ABS plastic engineered for automotive applications.\u003c\/li\u003e\n    \u003cli\u003eFitment: F20 F21 2011 to 2015 pre-LCI, including M135i and M140i.\u003c\/li\u003e\n    \u003cli\u003eInstallation time: around 30 minutes in typical workshop conditions.\u003c\/li\u003e\n    \u003cli\u003eFinish and fit: Excellent alignment with factory lines for a premium look.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cp\u003eBMW 1 Series F20 and F21 pre-LCI - 2011 to 2015. Compatible with M135i and M140i models.\u003c\/p\u003e\n  \n  \u003ch3\u003eWhat you receive\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eRear valance diffuser\u003c\/li\u003e\n    \u003cli\u003eRear side splitters - left and right\u003c\/li\u003e\n    \u003cli\u003eMounting hardware\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003eBM-1-F20-M-CNC-RS1A\u003c\/p\u003e\n  \n  \u003ch3\u003eFitting and installation\u003c\/h3\u003e\n  \u003cp\u003eProfessional installation recommended. Estimated install time is approximately 30 minutes.\u003c\/p\u003e\n  \u003cp\u003eWant it fitted by specialists? Book with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk\u003c\/p\u003e\n  \n  \u003ch3\u003ePre-dispatch compatibility check\u003c\/h3\u003e\n  \u003cp\u003eWe will verify suitability before shipping. Please provide your UK registration or the last 7 of your VIN at checkout so we can confirm the correct fit for your F20 or F21, including M135i or M140i.\u003c\/p\u003e\n  \n  \u003ch3\u003eManufacturer\u003c\/h3\u003e\n  \u003cp\u003eMaxton Design\u003c\/p\u003e\n  \n  \u003cp\u003eIf you are searching for a rear bumper lip for 1 Series F20 F21, a BMW 1er rear valance, M135i M140i rear aero, Maxton rear spats, or a pre-LCI diffuser insert, this kit hits the mark for style, quality and fit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Maxton Design","offers":[{"title":"Default Title","offer_id":56005756846466,"sku":null,"price":149.15,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/MaxtonDesignBMWF20F21M-PowerRearDiffuser_RearSideSplitters_Inc.M135i_M140i_-1_1946x_7cdef37f-16d2-4bd6-b88c-c72e62d75882.jpg?v=1764022143","url":"https:\/\/mjmodifications.co.uk\/products\/maxton-design-bmw-f20-f21-m-power-rear-diffuser-rear-side-splitters-inc-m135i-m140i","provider":"MJ Modifications","version":"1.0","type":"link"}