{"product_id":"dinan-bmw-x5-m-x6-m-f85-f86-axleback-exhaust-polished","title":"Dinan Free Flow Axleback Exhaust System - Polished Tips | BMW X5 M \/ X6 M (F85\/F86) | 2015-2019","description":"\u003cp\u003eThe S63 V8 in your X5 M or X6 M is one of the most capable engines BMW has ever built. The factory exhaust keeps that sound buried. This changes that.\u003c\/p\u003e\u003cp\u003eDinan's Free Flow Axleback Exhaust replaces the stock rear exhaust section with a 100% 16-gauge 304 stainless steel system built for long-term corrosion resistance and high-flow performance. The system carries over the factory computer-controlled valve, so behavior at low speeds and light loads stays civil. Crack the throttle and the valve opens fully, reducing backpressure and letting the S63 breathe the way it was designed to. Dinan measures the result: 8 HP and 7 lb-ft at 6,000 RPM, with improved exhaust flow across the entire rev range.\u003c\/p\u003e\u003cp\u003eThe design addresses the drone problem directly. A Helmholtz chamber engineered into the system targets and cancels the resonance frequencies that cause low-RPM cabin buzz in most aftermarket exhaust configurations. The sound you get is a deep, authoritative V8 growl under acceleration. The sound you don't get is the flat drone that makes a highway commute in an exhaust-modified car exhausting in the wrong way.\u003c\/p\u003e\u003cp\u003eThe system uses all factory brackets and hangers. No cutting, no welding, no fabrication. Polished quad 89mm (3.5\") laser-engraved Dinan tips complete the look.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMeasured gains: 8 HP \/ 7 lb-ft at 6,000 RPM\u003c\/li\u003e\n\u003cli\u003eQuad 89mm (3.5\") polished stainless tips with laser-engraved Dinan branding\u003c\/li\u003e\n\u003cli\u003eComputer-controlled valve opens fully under load for unrestricted flow\u003c\/li\u003e\n\u003cli\u003eHelmholtz chamber design eliminates resonance drone at highway cruise RPM\u003c\/li\u003e\n\u003cli\u003e100% 16-gauge 304 stainless steel construction for long-term corrosion resistance\u003c\/li\u003e\n\u003cli\u003eUses factory brackets and hangers for direct bolt-on installation\u003c\/li\u003e\n\u003cli\u003eDeep, aggressive sound character under load; composed at low speeds\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFitment confirmed for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBMW X5 M \/ F85 (2015-2018): Base\u003c\/li\u003e\n\u003cli\u003eBMW X6 M \/ F86 (2015-2019): Base\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBolt-on installation using factory hanger and bracket points. Professional installation is recommended given the size and weight of the system. Allow the stock system to cool completely before starting.\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eAllow the factory exhaust to cool completely before beginning removal\u003c\/li\u003e\n\u003cli\u003eDisconnect the factory rear exhaust section from its hangers and brackets\u003c\/li\u003e\n\u003cli\u003ePosition the Dinan axleback system and connect to the factory hangers and brackets\u003c\/li\u003e\n\u003cli\u003eTorque all connections to specification, verify tip alignment, and confirm valve operation before first drive\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":51332909596918,"sku":"DNND660-0054A","price":2599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2674\/6278\/files\/006e5bffa3d49d7b090be0ccd466f661L.jpg?v=1784932099","url":"https:\/\/autotecknic.com\/products\/dinan-bmw-x5-m-x6-m-f85-f86-axleback-exhaust-polished","provider":"AutoTecknic USA","version":"1.0","type":"link"}