{"product_id":"mazda-rx8-mx5-nb-super-fuji-lsd-upgrade-kit","title":"Mazda RX-8 Super LSD \u0026 Mazda MX-5 NB Fuji LSD Upgrade Kit","description":"\u003c!-- split --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Mazda RX-8 \/ MX-5 NB Fuji LSD Upgrade – RacingDiffs --\u003e\n\u003ch2 style=\"text-align: center;\"\u003eMazda RX-8 \/ MX-5 NB – Super \/ Fuji LSD Upgrade Kits\u003c\/h2\u003e\n\u003cp style=\"text-align: center; margin-top: -4px;\"\u003eFix OEM cone failures • 4× stronger locking • Street, track \u0026amp; drift ready\u003c\/p\u003e\n\u003cstyle\u003e\n  .rd-acc { margin: 0.6rem 0; border: 1px solid #e5e7eb; border-radius: 10px; }\n  .rd-acc \u003e summary { padding: 12px 14px; font-weight: 600; cursor: pointer; list-style: none; }\n  .rd-acc \u003e summary::-webkit-details-marker { display: none; }\n  .rd-acc[open] \u003e summary { border-bottom: 1px solid #e5e7eb; }\n  .rd-body { padding: 12px 14px 14px; }\n  .rd-body ul { padding-left: 18px; margin: 0.2rem 0 0.4rem; }\n  .rd-body p { margin: 0.2rem 0 0.4rem; }\n\u003c\/style\u003e\n\u003cp\u003eThe Mazda RX-8 and Mazda MX-5 NB are true driver’s cars, but their factory Limited Slip Differentials can share one major weakness: \u003cstrong\u003esmall friction cones pushed by weak springs\u003c\/strong\u003e. In the \u003cstrong\u003eMazda RX-8 Super LSD\u003c\/strong\u003e and selected \u003cstrong\u003eMazda MX-5 NB Fuji LSD\u003c\/strong\u003e units, these cones can wear or break, causing \u003cstrong\u003eloss of traction, weak preload and inconsistent locking\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/youtu.be\/ixf46NEvOsI?si=dgxUL-skV_8rPBP1\" target=\"_blank\" title=\"Mazda RX8 Super LSD Upgrade\/Repair Installation Tutorial | Boost Performance with RacingDiffs\" rel=\"noopener\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0361\/7652\/7495\/files\/Mazda_Rx8_super_LSD_friction_cone_standard_faliure_solution_by_racingdiffs_480x480.jpg?v=1782376959\" alt=\"Mazda RX-8 Super LSD installation tutorial showing RacingDiffs clutch plate upgrade replacing the factory friction cone limited slip differential\" style=\"float: none;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003eRacingDiffs developed \u003cstrong\u003ededicated upgrade kits\u003c\/strong\u003e for these LSD types, replacing the fragile cone design with a \u003cstrong\u003eproper clutch-based performance solution\u003c\/strong\u003e. Each variant is tailored to the exact dimensions of its LSD unit, so please select the correct version for your application.\u003c\/p\u003e\n\u003c!-- Kit Variants --\u003e\n\u003cdetails class=\"rd-acc\"\u003e\n\u003csummary\u003eKit Variants – RX-8 Super LSD \/ MX-5 NB Fuji LSD\u003c\/summary\u003e\n\u003cdiv class=\"rd-body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMazda RX-8 – Super LSD Upgrade Kit:\u003c\/strong\u003e Dedicated kit designed specifically for the RX-8 factory Super LSD carrier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMazda MX-5 NB – Fuji LSD Upgrade Kit:\u003c\/strong\u003e Dedicated kit designed specifically for the MX-5 NB factory Fuji LSD carrier.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e RX-8 and MX-5 NB versions are similar in concept, but they are \u003cstrong\u003enot the same kit\u003c\/strong\u003e. Always choose the correct variant before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- How It Works --\u003e\n\u003cdetails class=\"rd-acc\"\u003e\n\u003csummary\u003eHow the RacingDiffs Upgrade Fixes the OEM Weakness\u003c\/summary\u003e\n\u003cdiv class=\"rd-body\"\u003e\n\u003cp\u003eThe OEM Super \/ Fuji LSD design uses \u003cstrong\u003esmall friction cones behind the spider gears\u003c\/strong\u003e, preloaded by relatively weak springs. These cones are the \u003cstrong\u003eAchilles’ heel\u003c\/strong\u003e of the design – they:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWear quickly or break, even on \u003cstrong\u003elow-mileage cars\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCause \u003cstrong\u003eweak or inconsistent locking\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReduce traction during corner exit, drift initiation and hard driving\u003c\/li\u003e\n\u003cli\u003eMake the car feel unpredictable when you need grip the most\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOur upgrade removes the weak cone-based friction system and replaces it with \u003cstrong\u003eproper clutch plates, stronger springs and preload shims\u003c\/strong\u003e, turning the OEM LSD into a more reliable, performance-oriented unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- What's Included --\u003e\n\u003cdetails class=\"rd-acc\"\u003e\n\u003csummary\u003eWhat’s Included in Each Kit\u003c\/summary\u003e\n\u003cdiv class=\"rd-body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-performance clutch plates\u003c\/strong\u003e – replace fragile OEM friction cones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision preload shims\u003c\/strong\u003e – help set the correct locking force\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4× stronger springs\u003c\/strong\u003e – dramatically increase clamping and response\u003c\/li\u003e\n\u003cli\u003eAll parts sized specifically for either \u003cstrong\u003eRX-8 Super LSD\u003c\/strong\u003e or \u003cstrong\u003eMX-5 NB Fuji LSD\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe result is up to \u003cstrong\u003e4× better performance\u003c\/strong\u003e and vastly improved reliability compared to the stock cone-based design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- Key Benefits --\u003e\n\u003cdetails class=\"rd-acc\"\u003e\n\u003csummary\u003eKey Benefits\u003c\/summary\u003e\n\u003cdiv class=\"rd-body\"\u003e\n\u003cul\u003e\n\u003cli\u003eDedicated variants for \u003cstrong\u003eMazda RX-8 Super LSD\u003c\/strong\u003e and \u003cstrong\u003eMazda MX-5 NB Fuji LSD\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReplaces weak cones with \u003cstrong\u003edurable clutch plates\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4× stronger springs\u003c\/strong\u003e for stronger and faster LSD response\u003c\/li\u003e\n\u003cli\u003eImproved preload for \u003cstrong\u003ebetter traction and cornering stability\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHelps eliminate common OEM cone failures\u003c\/li\u003e\n\u003cli\u003eMore predictable locking behavior during spirited driving, track days and drifting\u003c\/li\u003e\n\u003cli\u003eRetains the OEM differential housing while greatly improving performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- Fitment \u0026 Use --\u003e\n\u003cdetails class=\"rd-acc\"\u003e\n\u003csummary\u003eFitment \u0026amp; Recommended Use\u003c\/summary\u003e\n\u003cdiv class=\"rd-body\"\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMazda RX-8\u003c\/strong\u003e equipped with the factory \u003cstrong\u003eSuper LSD\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMazda MX-5 NB\u003c\/strong\u003e equipped with the factory \u003cstrong\u003eFuji LSD\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot designed for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMazda MX-5 NA viscous LSD or Torsen LSD\u003c\/li\u003e\n\u003cli\u003eMazda MX-5 NB Torsen LSD\u003c\/li\u003e\n\u003cli\u003eMazda MX-5 NC Super LSD\u003c\/li\u003e\n\u003cli\u003eMazda MX-5 ND LSD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you are unsure which LSD type your car has, you can:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCheck the differential markings and internal LSD design\u003c\/li\u003e\n\u003cli\u003eCompare the internal cone-style LSD mechanism\u003c\/li\u003e\n\u003cli\u003eSend us photos and VIN so we can help confirm the correct kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRecommended for owners who demand \u003cstrong\u003econsistent traction, stronger preload and predictable locking behavior\u003c\/strong\u003e on road, track or drift events.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c!-- Why RacingDiffs --\u003e\n\u003cdetails class=\"rd-acc\"\u003e\n\u003csummary\u003eWhy Choose RacingDiffs for Your Mazda LSD?\u003c\/summary\u003e\n\u003cdiv class=\"rd-body\"\u003e\n\u003cul\u003e\n\u003cli\u003eDedicated upgrade kits for each specific LSD type — no universal compromises\u003c\/li\u003e\n\u003cli\u003eTrack-proven clutch technology and high-quality materials\u003c\/li\u003e\n\u003cli\u003eHuge improvement in \u003cstrong\u003egrip, control and reliability\u003c\/strong\u003e over the OEM cone design\u003c\/li\u003e\n\u003cli\u003eIdeal solution for rebuilding and upgrading tired factory Mazda LSD units\u003c\/li\u003e\n\u003cli\u003eWorldwide express shipping and technical support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eResult:\u003c\/strong\u003e Your RX-8 or MX-5 NB gets the LSD performance it should have had from factory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e","brand":"RacingDiffs","offers":[{"title":"RX8","offer_id":46728355414252,"sku":"RD4078","price":239.0,"currency_code":"EUR","in_stock":true},{"title":"MX-5 Miata NB ('99 - '05)","offer_id":47784757919980,"sku":"RD4082","price":239.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0361\/7652\/7495\/files\/Mazda-RX8-Mx5-NB-LSD-repair-kit.jpg?v=1782377662","url":"https:\/\/racingdiffs.com\/products\/mazda-rx8-mx5-nb-super-fuji-lsd-upgrade-kit","provider":"RacingDiffs","version":"1.0","type":"link"}