{"product_id":"os-giken-osgmz191-ha-superlock-lsd-mazda-mx-5-nd-2016-2023","title":"OS Giken 2016 Mazda Miata MX-5 ND 2.0L LSD","description":"\u003ch4\u003eTrack-Proven Torque Control for the Mazda MX-5 ND1 and ND2 Platform\u003c\/h4\u003e\u003cp\u003eThe OS Giken OSGMZ191-HA Super Lock LSD is engineered specifically for the 2016-2023 Mazda MX-5 Miata ND1 and ND2 with the 6-speed manual transmission. Purpose-built for the ND differential housing, it replaces the factory open differential with OS Giken's patented pressure ring, spline-through-side-gear design featuring up to twice the friction plate count of competing units. The result is a progressive, predictable limited-slip that eliminates inside wheel spin on corner exit without sacrificing the MX-5's trademark balance and feel.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOS Giken Super Lock 1.5-way LSD with patented pressure ring design\u003c\/li\u003e\n\u003cli\u003eSpline-through-side-gear construction for superior load distribution\u003c\/li\u003e\n\u003cli\u003eUp to 2x more friction plates than competing units for more consistent lockup\u003c\/li\u003e\n\u003cli\u003eCNC-machined billet differential case for maximum rigidity\u003c\/li\u003e\n\u003cli\u003eRamp angles: 25 degrees acceleration \/ 35 degrees deceleration\u003c\/li\u003e\n\u003cli\u003eLock Timing: 224 for smooth, progressive engagement\u003c\/li\u003e\n\u003cli\u003eTotal friction plates: 20 for exceptional torque transfer\u003c\/li\u003e\n\u003cli\u003ePreload: 10S tuned for spirited street and track use\u003c\/li\u003e\n\u003cli\u003eCompatible with ND1 (2016-2018) and ND2 (2019-2023) platforms\u003c\/li\u003e\n\u003cli\u003e6-speed manual transmission only, automatic not compatible\u003c\/li\u003e\n\u003cli\u003eDirect bolt-in replacement, no differential housing modification required\u003c\/li\u003e\n\u003cli\u003eMade in Japan by OS Giken to motorsport-grade tolerances\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016-2023\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMX-5 Miata ND\u003c\/td\u003e\n\u003ctd\u003eSport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016-2023\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMX-5 Miata ND\u003c\/td\u003e\n\u003ctd\u003eClub\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016-2023\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMX-5 Miata ND\u003c\/td\u003e\n\u003ctd\u003eGrand Touring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016-2023\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMX-5 Miata ND RF\u003c\/td\u003e\n\u003ctd\u003eClub\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016-2023\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMX-5 Miata ND RF\u003c\/td\u003e\n\u003ctd\u003eGrand Touring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eOSGMZ191-HA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eOS Giken\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLSD Type\u003c\/td\u003e\n\u003ctd\u003eSuper Lock 1.5-way\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRamp Angles\u003c\/td\u003e\n\u003ctd\u003e25 Accel \/ 35 Decel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLock Timing\u003c\/td\u003e\n\u003ctd\u003e224\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Friction Plates\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreload Setting\u003c\/td\u003e\n\u003ctd\u003e10S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform Compatibility\u003c\/td\u003e\n\u003ctd\u003eMazda MX-5 ND1 (2016-2018), ND2 (2019-2023)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Compatibility\u003c\/td\u003e\n\u003ctd\u003e6-speed manual only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBillet differential case, hardened friction plates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Manufacture\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\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\u003e1x OS Giken OSGMZ191-HA Super Lock LSD unit\u003c\/li\u003e\n\u003cli\u003eFriction plates and pressure rings pre-assembled\u003c\/li\u003e\n\u003cli\u003eInstallation hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout OS Giken\u003c\/h4\u003e\u003cp\u003eFounded in 1969 in Okayama, Japan, OS Giken has spent over five decades developing precision drivetrain components trusted by professional racing teams at the highest levels of motorsport. Their Super Lock LSD series is engineered to the same exacting tolerances as their competition units, delivering race-derived performance in a streetable package. Every OSGMZ191-HA is manufactured entirely in-house and inspected before shipment.\u003c\/p\u003e\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\u003cstrong\u003eDoes the OSGMZ191-HA fit the automatic transmission MX-5 ND?\u003c\/strong\u003e\u003cp\u003eNo. The OSGMZ191-HA is designed for the 6-speed manual transmission MX-5 ND only. The automatic transmission version of the ND uses a different differential configuration and is not compatible with this unit.\u003c\/p\u003e\u003cstrong\u003eWhat is the difference between the ND1 and ND2 MX-5, and does this LSD fit both?\u003c\/strong\u003e\u003cp\u003eThe ND1 covers 2016-2018 model years and the ND2 covers 2019-2023 with engine and suspension revisions. The OSGMZ191-HA is compatible with both ND1 and ND2 platforms, as the differential housing and axle configuration remain the same across both generations.\u003c\/p\u003e\u003cstrong\u003eWhat does a 1.5-way LSD do in a Miata compared to an open differential?\u003c\/strong\u003e\u003cp\u003eAn open differential allows the inside wheel to spin freely under acceleration in a corner, limiting traction and causing understeer. The OSGMZ191-HA's 1.5-way design applies lockup under acceleration and partial lockup under deceleration, sending power to the wheel with more grip and dramatically improving corner exit traction and driver confidence.\u003c\/p\u003e\u003cstrong\u003eWill the OS Giken LSD cause any driveline noise or vibration on the street?\u003c\/strong\u003e\u003cp\u003eProperly installed and serviced with the correct gear oil, the OSGMZ191-HA operates quietly on the street. Some minor engagement rattle at very low speeds is normal behavior for a mechanical LSD and is not a defect. Using LSD-suppressing additives is not recommended.\u003c\/p\u003e\u003cstrong\u003eWhat gear oil should I use with the OSGMZ191-HA?\u003c\/strong\u003e\u003cp\u003eOS Giken recommends 75W-90 GL-4 or GL-5 gear oil without friction modifier additives. Additives that reduce chatter will also reduce the friction plate engagement force, diminishing performance. Change the oil at 500 miles after installation and then follow a standard service interval of 15,000-20,000 miles or annually.\u003c\/p\u003e\u003cstrong\u003eCan I rebuild or retune the OSGMZ191-HA after track use?\u003c\/strong\u003e\u003cp\u003eYes. OS Giken LSDs are fully rebuildable. Friction plates can be replaced when worn, and ramp angle components can be swapped to alter the engagement characteristics. OS Giken USA offers rebuild kits and technical support for customers who want to service or retune their unit.\u003c\/p\u003e\u003cstrong\u003eDoes the OSGMZ191-HA improve lap times at the track?\u003c\/strong\u003e\u003cp\u003eYes, consistently. Eliminating inside wheel spin on corner exit is one of the most significant performance gains available for the MX-5 platform. The OSGMZ191-HA delivers full-power exits from slower corners without the understeer and loss of rotation that an open differential produces, resulting in measurably faster lap times.\u003c\/p\u003e\u003cstrong\u003eIs professional installation required for the OS Giken OSGMZ191-HA?\u003c\/strong\u003e\u003cp\u003eProfessional installation is strongly recommended. While the unit is a direct bolt-in replacement, proper ring and pinion backlash and bearing preload setup requires precision tools and differential experience. Incorrect setup can damage the differential and void any warranty.\u003c\/p\u003e\u003ch4\u003eInstallation Overview\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eSafely lift and support the vehicle, drain differential fluid completely\u003c\/li\u003e\n\u003cli\u003eRemove driveshaft, axle shafts, and differential rear cover\u003c\/li\u003e\n\u003cli\u003eRemove the OEM open differential unit from the housing\u003c\/li\u003e\n\u003cli\u003eTransfer the ring gear to the OSGMZ191-HA carrier using factory bolts torqued to specification\u003c\/li\u003e\n\u003cli\u003eInstall the OSGMZ191-HA into the differential housing\u003c\/li\u003e\n\u003cli\u003eSet ring and pinion backlash and bearing preload per Mazda factory specification\u003c\/li\u003e\n\u003cli\u003eReinstall differential cover, axle shafts, and driveshaft\u003c\/li\u003e\n\u003cli\u003eFill with fresh 75W-90 GL-4\/GL-5 gear oil to the correct level\u003c\/li\u003e\n\u003cli\u003ePerform a 500-mile break-in with moderate driving before track use\u003c\/li\u003e\n\u003cli\u003eChange gear oil at 500 miles, then follow standard service intervals\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"OS Giken","offers":[{"title":"Default Title","offer_id":46034713083983,"sku":"OSGMZ191-HA","price":1349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/OS_Giken_LSD_2016-2023_Mazda_MX-5_ND.jpg?v=1783631880","url":"https:\/\/www.blackopsautoworks.com\/products\/os-giken-osgmz191-ha-superlock-lsd-mazda-mx-5-nd-2016-2023","provider":"Black Ops Auto Works","version":"1.0","type":"link"}