OS SuperLock LSD for Nissan Z33/34 350Z/370Z (Replaces OEM Non-LSD)

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  • Regular price $1,520.00
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The OS Giken Super Lock LSD uses our patented pressure ring design that allows for smooth, progressive locking. This design is a spline-through-side-gear design that allows for fitment of more friction plates (up to 2x as many as competitors versions). 

  • All components are chemically heat treated for maximum durability
  • All components are constructed from a high-grade steel alloy
  • Gears are raw-forged for maximum strength
  • Clutch disks are precision-machined simultaneously on both sides to extremely tight tolerances resulting in minimal warpage.
  • LSD case is machined from a single billet piece to ensure uniformity.

The OS LSD standard spec allows for low preload while still retaining a fully progressive 100% lock capability. Operation is quiet and the progressive locking allows for smooth predictable locking. When replacing an open diff, equipping an

OS LSD will completely improve the driving experience while maintaining everyday drivability.


  • Nissan 350Z - VQ35DE/HR (Non-LSD; internal circlip type) 

  • Nissan 370Z - VQ37HR  (Non-LSD; internal circlip type)


  • Ramps - 25/38
  • Lock Timing - 336
  • Total Plates - 20
  • Preload - 12S

Installation Notes:

  • Refer to OEM Service Manual for install

  • For Nissan Z33 350Z fitment, please confirm vehicle is equipped with OEM Nissan PN:38220-AR000 x2
  • For Nissan Z34 370Z fitment, please confirm vehicle is equipped either with        - OEM Nissan PN:38220-EG000 x2 (Non-threaded flange holes type)
    - OEM Nissan PN:38220-1NC0A x2 (Threaded flange holes type)