{"product_id":"dinan-free-flow-axle-back-exhaust-2020-2025-bmw-x3m-x4m","title":"Dinan Free Flow Axle-Back Exhaust - 2020-2025 BMW X3M\/X4M","description":"\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe \"baby M's\" of the X family finally get a big-brother voice. Dinan's Free Flow Axle-Back replaces the restrictive factory rear section on the F97 X3M and F98 X4M (S58) with a valved, straight-through system that delivers a deeper, fuller, more menacing tone — with civility on demand. Larger 76mm tubing (vs 70mm stock) frees flow through both outer pipes when the enlarged, computer-controlled valves are open; when closed, gases route through the muffler and exit the two inner tips for quiet cruising. Drone-abatement technology inside the can keeps the cabin conversation-friendly regardless of valve position.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e76mm mandrel-bent T304 stainless steel tubing (vs 70mm stock)\u003c\/li\u003e\n\u003cli\u003eTwin 76mm exhaust valves, ~30% less restrictive than OE\u003c\/li\u003e\n\u003cli\u003eRetains factory computer-controlled valve operation\u003c\/li\u003e\n\u003cli\u003eVerified gains: +8 HP and +6 lb-ft of torque at 6600 RPM\u003c\/li\u003e\n\u003cli\u003eQuad 114mm (4.5\") tips\u003c\/li\u003e\n\u003cli\u003eDrone-abatement muffler for low-drone cruising\u003c\/li\u003e\n\u003cli\u003eFinish: polished stainless or black ceramic-coated tips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDinan valved axle-back exhaust section\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/ed3394890186e5d5bd14e406bee1e7caed0b1a2c.pdf?v=1785452306\" rel=\"noopener\" target=\"_blank\"\u003eInstallation Instructions (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003ePair with the Dinan \u003ca href=\"https:\/\/x58cartel.com\/products\/dinan-dual-exhaust-valve-remote\"\u003eDual Exhaust Valve Remote (R660-0002)\u003c\/a\u003e for one-touch valve control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePART NUMBER\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePolished — D660-0086\u003c\/li\u003e\n\u003cli\u003eBlack Ceramic Coated — D660-0086-BLK\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX3 M\u003c\/td\u003e\n\u003ctd\u003eF97\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2020–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX4 M\u003c\/td\u003e\n\u003ctd\u003eF98\u003c\/td\u003e\n\u003ctd\u003eS58\u003c\/td\u003e\n\u003ctd\u003e2020–2025\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Dinan","offers":[{"title":"Black Ceramic Coated","offer_id":53762122711347,"sku":"D660-0086-BLK","price":2699.95,"currency_code":"USD","in_stock":true},{"title":"Polished","offer_id":53762122678579,"sku":"D660-0086","price":2599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/4226\/2579\/files\/7e9025296ba75d8c11aae853bef1e2636ba9e37b.jpg?v=1785520722","url":"https:\/\/x58cartel.com\/products\/dinan-free-flow-axle-back-exhaust-2020-2025-bmw-x3m-x4m","provider":"x58cartel","version":"1.0","type":"link"}