{"product_id":"wavetrac-lsd-for-bmw-215k-axle-welded-ring-gear-r-2-35-2-81-f10-550i-e90-335d-135i-335is-dct-z4-35i-dct","title":"Wavetrac LSD for BMW 215K Axle, Welded Ring Gear, r=2.35-2.81: F10 550i, E90 335d, 135i \u0026 335is DCT, Z4 35i DCT","description":"\u003cp\u003eA limited slip differential for BMW's 215K rear axle with a welded ring gear and a tall 2.35 to 2.81 final drive: the F10 550i, the E90 335d, the DCT versions of the 135i and 335is, and the E89 Z4 35i DCT. The welded factory ring gear needs separating and machining before the Wavetrac goes in; after that, the drive goes to the wheel with grip.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor BMW's 215K axle with a welded ring gear, 2.35 to 2.81 final drive\u003c\/li\u003e\n\u003cli\u003eF10 550i, E90 335d, 135i and 335is DCT, Z4 35i DCT\u003c\/li\u003e\n\u003cli\u003eThe welded ring gear needs specialist machining (not included)\u003c\/li\u003e\n\u003cli\u003eIn almost any axle, the Wavetrac is not the limit on torque\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCheck before you order\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eThe factory ring gear is friction-welded to the open differential: it has to be split off, machined and threaded to take the Wavetrac and ARP bolts. Machining and bolts are not included.\u003c\/li\u003e\n\u003cli\u003eThe cars listed are a guide only: BMW fitted more than one axle size and final drive ratio to the same model. Confirm your axle size and ratio from the VIN or the axle's part number before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable class=\"spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003ctd\u003e30.309.172WK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eAutomatic torque-biasing limited slip differential (helical gear)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGears\u003c\/th\u003e\n\u003ctd\u003e9310 alloy steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiff body\u003c\/th\u003e\n\u003ctd\u003eMachined from case-hardened steel billet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFasteners\u003c\/th\u003e\n\u003ctd\u003eARP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBias plates\u003c\/th\u003e\n\u003ctd\u003eCarbon fibre as standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMade in\u003c\/th\u003e\n\u003ctd\u003eUSA, by Autotech Driveline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAxle\u003c\/th\u003e\n\u003ctd\u003eBMW 215K, welded ring gear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinal drive ratio\u003c\/th\u003e\n\u003ctd\u003e2.35 to 2.81\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ctable class=\"fitment-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eVersion\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e1-Series\u003c\/td\u003e\n\u003ctd\u003eE82 135i DCT\u003c\/td\u003e\n\u003ctd\u003e2010-2013\u003c\/td\u003e\n\u003ctd\u003eRear axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e3-Series\u003c\/td\u003e\n\u003ctd\u003eE90 335d\u003c\/td\u003e\n\u003ctd\u003e2006-2013\u003c\/td\u003e\n\u003ctd\u003eRear axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e3-Series\u003c\/td\u003e\n\u003ctd\u003eE92 335is DCT\u003c\/td\u003e\n\u003ctd\u003e2010-2013\u003c\/td\u003e\n\u003ctd\u003eRear axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e5-Series\u003c\/td\u003e\n\u003ctd\u003eF10 550i\u003c\/td\u003e\n\u003ctd\u003e2010-2017\u003c\/td\u003e\n\u003ctd\u003eRear axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eZ4\u003c\/td\u003e\n\u003ctd\u003eE89 35i DCT\u003c\/td\u003e\n\u003ctd\u003e2009-2016\u003c\/td\u003e\n\u003ctd\u003eRear axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Wavetrac","offers":[{"title":"Default Title","offer_id":57513719497084,"sku":"30.309.172WK","price":1428.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/9208\/4867\/files\/wavetrac-30-309-172wk-wavetrac-lsd-for-bmw-215k-axle-welded-ring-gear-r-2-35-2-81--1.jpg?v=1790680853","url":"https:\/\/fdracing.co.uk\/products\/wavetrac-lsd-for-bmw-215k-axle-welded-ring-gear-r-2-35-2-81-f10-550i-e90-335d-135i-335is-dct-z4-35i-dct","provider":"FD Racing","version":"1.0","type":"link"}