{"product_id":"dinan-free-flow-exhaust-with-polished-tips-550i-and-xdrive-sedan-f10-2011-2015","title":"Dinan Free Flow Valved Rear Exhaust Muffler for BMW 5 Series F10 550i \u0026 550i xDrive 2011-2015 - Stainless Axle-Back Back Box\/Silencer, 3.5in Polished Tips, Drone Free, Bolt-On Fit, V8 Sound Upgrade","description":"\u003cdiv\u003e\n  \u003ch2\u003eStainless Valve-Controlled Rear Section for BMW F10 550i and 550i xDrive 2011-2015\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Transform your V8 5 Series with this Dinan stainless rear silencer upgrade. Expect a richer, deeper tone on throttle, smooth refinement on the motorway and zero cabin resonance. Precision engineered for the F10 550i and 550i xDrive saloon, this axle-back system improves gas flow, trims weight versus the factory back box and finishes the look with tasteful 3.5 inch polished tailpipes.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    We run this system on our own cars as well as customer vehicles and the feedback is consistently brilliant. Calm when cruising, assertive when you want it and genuinely drone free. If you want everyday civility with a proper performance soundtrack, this is the set-up to choose.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey benefits\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDesigned specifically for BMW F10 550i and 550i xDrive saloon 2011, 2012, 2013, 2014, 2015\u003c\/li\u003e\n    \u003cli\u003eValve-controlled butterfly keeps it quiet on part throttle and opens for a stronger, sportier note under load\u003c\/li\u003e\n    \u003cli\u003eImproved exhaust gas flow and response with reduced back pressure\u003c\/li\u003e\n    \u003cli\u003eDrone-free refinement for daily use and long-distance touring\u003c\/li\u003e\n    \u003cli\u003e100 percent stainless construction for long-term durability and corrosion resistance\u003c\/li\u003e\n    \u003cli\u003eDirect bolt-on fit using factory hangers for OE-like alignment\u003c\/li\u003e\n    \u003cli\u003e noticeable weight saving compared to the stock rear box\u003c\/li\u003e\n    \u003cli\u003e3.5 inch polished tailpipe tips for a clean, subtle OE-plus appearance\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW 5 Series F10 550i and 550i xDrive saloon, model years 2011 to 2015. Rear section replacement.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eSound and drivability\u003c\/h3\u003e\n  \u003cp\u003e\n    The vacuum-actuated valve maintains a civilised character around town and on the motorway, then opens for a deeper, more engaging tone when you press on. Inside the cabin there is no unwanted boom or hum.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eBuild quality\u003c\/h3\u003e\n  \u003cp\u003e\n    Crafted in stainless steel to precise tolerances, this rear section lines up perfectly on the original mounts. The dual 3.5 inch polished tips deliver a premium finish without being over the top.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eInstallation\u003c\/h3\u003e\n  \u003cp\u003e\n    Straightforward bolt-on upgrade. Professional fitting recommended.\u003cbr\u003e\n    For installation, book with MJ Modifications in Warwickshire or request a quote via \n    \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhy buy from us\u003c\/h3\u003e\n  \u003cp\u003e\n    Trusted UK specialists with hands-on experience installing this exact rear silencer on F10 550i models. Genuine parts, clear advice and aftercare that enthusiasts appreciate.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCommon search phrases\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW F10 550i sports muffler UK, 550i xDrive rear silencer, valve-controlled back box F10, stainless rear section 5 Series V8, polished tailpipe tips 3.5 inch BMW 550i, axle-back system F10 2011 2012 2013 2014 2015, BMW 5 Series V8 sound upgrade, drone free BMW 550i exhaust note, performance rear box 550i saloon, Dinan stainless muffler UK.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Performance M","offers":[{"title":"Default Title","offer_id":55975106969986,"sku":"4z58v3zqh0","price":2127.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/D660-0036__56891.1535040904.png?v=1763320485","url":"https:\/\/mjmodifications.co.uk\/products\/dinan-free-flow-exhaust-with-polished-tips-550i-and-xdrive-sedan-f10-2011-2015","provider":"MJ Modifications","version":"1.0","type":"link"}