{"product_id":"dinan-17-21-bmw-m240i-m240i-xdrive-f22-f23-free-flow-axleback-exhaust-system-black-tips","title":"Dinan Free Flow Axleback for 2017-2021 BMW M240i - Black Tips","description":"\u003ch4\u003eAdd a deeper M240i exhaust note while retaining factory mounting points\u003c\/h4\u003e\u003cp\u003eDinan D660-0067-BLK is a rear-section exhaust for supported F22 coupe and F23 convertible M240i models. The 16-gauge 304 stainless assembly uses a Helmholtz chamber to manage undesirable frequencies and finishes with black ceramic 89mm tips.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e16-gauge 304 stainless-steel construction\u003c\/li\u003e\n\u003cli\u003eHelmholtz chamber targets undesirable exhaust frequencies\u003c\/li\u003e\n\u003cli\u003eBlack ceramic 89mm or 3.5-inch exhaust tips\u003c\/li\u003e\n\u003cli\u003eManufacturer-rated gains of 6 hp and 5 lb-ft at 6,600 rpm\u003c\/li\u003e\n\u003cli\u003eUses the factory mounting locations\u003c\/li\u003e\n\u003cli\u003eEliminates operation of the factory exhaust valve\u003c\/li\u003e\n\u003cli\u003eDinan emissions code 5 because emissions equipment is unaffected\u003c\/li\u003e\n\u003cli\u003eExact Dinan application is identified by manufacturer part number D660-0067-BLK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eApplication details and restrictions\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears \/ Scope\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel \/ Component\u003c\/th\u003e\n\u003cth\u003eRequirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2021\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i Coupe\u003c\/td\u003e\n\u003ctd\u003eF22; rear-wheel drive or xDrive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2021\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i Convertible\u003c\/td\u003e\n\u003ctd\u003eF23; rear-wheel drive or xDrive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eDinan's current product page lists the 2017-2021 M240i platform. Confirm the F22 coupe or F23 convertible chassis and the black-tip configuration. Installation requires cutting the factory exhaust at the location specified by Dinan.\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003eD660-0067-BLK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eFree Flow axleback exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e16-gauge 304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip Finish\u003c\/td\u003e\n\u003ctd\u003eBlack ceramic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip Size\u003c\/td\u003e\n\u003ctd\u003e89mm \/ 3.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSound Control\u003c\/td\u003e\n\u003ctd\u003eHelmholtz chamber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Rated Gain\u003c\/td\u003e\n\u003ctd\u003e+6 hp and +5 lb-ft at 6,600 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEstimated Labor\u003c\/td\u003e\n\u003ctd\u003e1.3 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmissions\u003c\/td\u003e\n\u003ctd\u003eCode 5; emissions unaffected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e813725023977\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDinan D660-0067-BLK: One rear axleback exhaust assembly\u003c\/li\u003e\n\u003cli\u003eBlack ceramic exhaust tips\u003c\/li\u003e\n\u003cli\u003eApplication-specific clamps, hangers, and installation hardware identified by Dinan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout Dinan\u003c\/h4\u003e\u003cp\u003eDinan develops performance hardware and software for Audi, Volkswagen, Porsche, and related platforms. Its application-specific components are engineered around verified vehicle, engine, transmission, and emissions requirements rather than model name alone.\u003c\/p\u003e\u003ch4\u003eRelated Parts\u003c\/h4\u003e\u003cul\u003e\u003cli\u003eNo related store product is linked because supporting components must be verified for the exact vehicle, engine, transmission, and current Dinan configuration.\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the D660-0067-BLK?\u003c\/strong\u003e\u003cp\u003eIt is axleback exhaust system for the exact application and restrictions shown above.\u003c\/p\u003e\u003cstrong\u003eWhich body styles are supported?\u003c\/strong\u003e\u003cp\u003eDinan lists the F22 M240i coupe and F23 M240i convertible.\u003c\/p\u003e\u003cstrong\u003eDoes it support xDrive?\u003c\/strong\u003e\u003cp\u003eYes. The current Dinan application covers both rear-wheel-drive and M240i xDrive models.\u003c\/p\u003e\u003cstrong\u003eWhat material is used?\u003c\/strong\u003e\u003cp\u003eThe system is made from 16-gauge 304 stainless steel.\u003c\/p\u003e\u003cstrong\u003eWhat finish is on the tips?\u003c\/strong\u003e\u003cp\u003eThis exact configuration uses black ceramic 89mm exhaust tips.\u003c\/p\u003e\u003cstrong\u003eDoes the factory exhaust need to be cut?\u003c\/strong\u003e\u003cp\u003eYes. Dinan's instructions require cutting the original exhaust at the specified location.\u003c\/p\u003e\u003cstrong\u003eWhat happens to the factory exhaust valve?\u003c\/strong\u003e\u003cp\u003eDinan states that this axleback eliminates operation of the factory exhaust valve.\u003c\/p\u003e\u003cstrong\u003eWhat gains does Dinan report?\u003c\/strong\u003e\u003cp\u003eDinan reports gains of 6 hp and 5 lb-ft at 6,600 rpm.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eConfirm the vehicle is a supported F22 coupe or F23 convertible M240i and verify the Dinan D660-0067-BLK part label.\u003c\/li\u003e\n\u003cli\u003eAllow the exhaust to cool, raise the vehicle at approved lift points, and review Dinan installation document D660-0067.\u003c\/li\u003e\n\u003cli\u003eMeasure and mark the factory exhaust at Dinan's specified cutting location before supporting and cutting the original rear section.\u003c\/li\u003e\n\u003cli\u003eDeburr the cut tube and install the Dinan axleback, clamps, hangers, and tips in the orientation shown by Dinan.\u003c\/li\u003e\n\u003cli\u003eCenter both tips in the rear openings, verify underbody and bumper clearance, then tighten all joints to Dinan's current values.\u003c\/li\u003e\n\u003cli\u003eStart the vehicle in a ventilated area, inspect for leaks or contact, and recheck alignment and clamp security after the first complete heat cycle.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":68157158424655,"sku":"DNND660-0067-BLK","price":1649.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/dinan-d660-0067-blk-axleback-exhaust-system-01.webp?v=1794635017","url":"https:\/\/www.blackopsautoworks.com\/products\/dinan-17-21-bmw-m240i-m240i-xdrive-f22-f23-free-flow-axleback-exhaust-system-black-tips","provider":"Black Ops Auto Works","version":"1.0","type":"link"}