{"product_id":"racingdiffs-clutch-type-limited-slip-differential-lsd-for","title":"RacingDiffs Clutch-Type Limited Slip Differential (LSD) for","description":"The RacingDiffs RD1008 is a fully adjustable clutch-type Limited Slip Differential (LSD) built to transform the driving dynamics of BMW E46, E39, and Z4 (E85) models equipped with the 188K differential. This unit allows for precise tuning of lockup from a mild ~25% to a nearly 100% welded-like feel, making it adaptable to a wide array of applications, from track days like time-attack and hill climbs to competitive drifting, drag racing, and everyday street driving.\n\nEach differential is assembled with a brand-new, fully-forged LSD core for superior strength and durability. The kit is comprehensive, including new carrier and pinion bearings, new oil seals, and a housing that has been sandblasted and painted for a robust finish. The adjustability is a key feature, allowing users to customize ramp angles, active clutch count, housing type, gear ratio, finish color, and even add laser engraving to the rear cover. This customization ensures the differential can evolve with a user's build, eliminating the need for multiple differential units over time.\n\nInstallation involves a bolt-in process into existing 188K housings, requiring the setting of backlash and preload to BMW specifications. Ring gear bolts must be torqued with thread-locker. For optimal performance and longevity, quality 75W-140 GL-5 LSD oil is recommended after an initial break-in period, with Ravenol Racing specifically suggested.\n\nThis differential is compatible with a specific range of BMW E46, E39, and Z4 (E85) models that utilize the 188K differential. Fitment includes numerous E46 variants such as the 318d, 320i, 325xi, and 330i; E39 models like the 520i, 525d, and 530i; and Z4 (E85) models including the 2.2i, 2.5i, and 3.0i. The product is custom-assembled to order, with a typical lead time of approximately two weeks.","brand":"Racingsdiffs","offers":[{"title":"Default Title","offer_id":52663420584248,"sku":"RD1008","price":3045.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687135159.webp?v=1784326762","url":"https:\/\/store.motormia.co\/products\/racingdiffs-clutch-type-limited-slip-differential-lsd-for","provider":"MOTORMIA","version":"1.0","type":"link"}