{"product_id":"dinan-free-flow-axle-back-exhaust-black-tips-bmw-f97-x3-m-f98-x4-m","title":"Dinan Free Flow Axle-Back Exhaust with Black Tips - BMW F97 X3 M \/ F98 X4 M (2020-2025)","description":"\u003cp\u003eAn X3 M or X4 M runs the same S58 you find in the M3 and M4. From the driver's seat, the factory exhaust does a good job of hiding that fact. Heavy SUV muffling, a narrow tone, and tips that look small in that wide rear valance. If you bought the fast one, it should sound like the fast one.\u003c\/p\u003e\n\u003cp\u003eThe Dinan Free Flow Axle-Back Exhaust for the BMW F97 X3 M and F98 X4 M swaps the factory rear section for 76mm T304 stainless tubing, 76mm valves that are 30% less restrictive than stock, and quad 4.5 in. black ceramic tips. Dinan measured +8 HP and +6 lb-ft at 6600 RPM, and the system is 5 lbs lighter than the factory part.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow the Dinan X3 M Axle-Back Exhaust Sounds and Flows\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDinan kept the factory computer-controlled exhaust valves. That matters. At low speed and light load the valves stay closed and the car stays livable, so you are not droning down the freeway on a family trip. Put your foot down and the valves open, and the larger tubing lets the S58 breathe with what Dinan describes as a deeper, fuller tone that mimics a straight pipe.\u003c\/p\u003e\n\u003cp\u003eThe system is 100% T304 stainless steel, TIG welded with a brushed finish. The four 4.5 in. clamp-on tips carry a black ceramic coating and a laser-engraved Dinan logo, and they fill the factory tip cutouts with a proper M-car presence.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAxle-Back Exhaust Install and Legal Status\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo cutting and no coding. It is a bolt-on axle-back that uses the factory mounting points, with a Dinan-quoted labor time of 2.5 hours. Dinan states it is legal for sale or use on emissions-controlled vehicles because it does not affect vehicle emissions. Dinan part number D660-0086-BLK. Sold by AutoTecknic, an authorized Dinan dealer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDinan Free Flow axle-back exhaust with 76mm valves\u003c\/li\u003e\n  \u003cli\u003eQuad 4.5 in. black ceramic laser-engraved clamp-on tips\u003c\/li\u003e\n  \u003cli\u003eMounting hardware and band clamps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDinan-tested +8 HP and +6 lb-ft at 6600 RPM\u003c\/li\u003e\n  \u003cli\u003e76mm tubing vs 70mm stock\u003c\/li\u003e\n  \u003cli\u003e76mm exhaust valves, 30% less restrictive than factory\u003c\/li\u003e\n  \u003cli\u003eFactory computer-controlled valve operation retained\u003c\/li\u003e\n  \u003cli\u003e100% T304 stainless steel, TIG welded, brushed finish\u003c\/li\u003e\n  \u003cli\u003eQuad 4.5 in. black ceramic tips with laser-engraved Dinan logo\u003c\/li\u003e\n  \u003cli\u003e5 lbs lighter than stock (72 lbs)\u003c\/li\u003e\n  \u003cli\u003eBolt-on install, about 2.5 hours\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits the following S58-powered BMW M models:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBMW X3 M \/ F97 (2020-2025): X3 M, X3 M Competition\u003c\/li\u003e\n  \u003cli\u003eBMW X4 M \/ F98 (2020-2025): X4 M, X4 M Competition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis part is listed only for the F97 X3 M and F98 X4 M. It is not listed for the X3 M40i or X4 M40i.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a straightforward bolt-on job for a shop or an experienced DIYer with a lift. Budget about 2.5 hours and a second pair of hands, since the full assembly weighs 72 lbs. Follow the Dinan instructions included with the kit.\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eLet the exhaust cool completely and raise the vehicle safely.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the factory exhaust valve actuators and loosen the clamp ahead of the rear section.\u003c\/li\u003e\n  \u003cli\u003eSupport the factory rear section, release it from the hangers and remove it.\u003c\/li\u003e\n  \u003cli\u003eFit the Dinan axle-back to the factory mounting points and connect it with the supplied band clamps, transferring the valve actuators as directed.\u003c\/li\u003e\n  \u003cli\u003eInstall and align the quad tips, torque all clamps, reconnect the actuators and check for leaks and correct valve operation with the engine running.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":51268700766454,"sku":"DNND660-0086-BLK","price":1349.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2674\/6278\/files\/06a14295bfb923456da128211c980991L.jpg?v=1784135580","url":"https:\/\/autotecknic.com\/products\/dinan-free-flow-axle-back-exhaust-black-tips-bmw-f97-x3-m-f98-x4-m","provider":"AutoTecknic USA","version":"1.0","type":"link"}