MX-5 OS Giken Super Lock LSD MZ191-HA, MK4 2.0 Ltr.

MX-5 OS Giken Super Lock LSD MZ191-HA, MK4 2.0 Ltr.
The OS Giken Super Lock Limited Slip Differential (LSD) with part number MZ191-HA is a high-end limited slip differential solution for the Mazda MX-5 MK4 (2015–present). Developed for maximum performance on the road and racetrack, this differential combines maximum traction with exceptionally smooth and controllable locking action.

Vehicle compatibility
Mazda MX-5 MK4 2.0L (Skyactiv-G)
ND1 & ND2 models, manual Transmission

Technical Highlights
Super Lock Multi-Disc Technology
The patented pressure ring system ensures a progressive, even locking effect without abrupt intervention.
The spline-through side gear design allows more friction discs to be installed than in conventional LSDs – for:
More stable power distribution, higher continuous load capacity, consistent performance even under racing conditions
1.5-way design, full locking effect during acceleration
Partial locking effect during deceleration
Ideal for sporty road drivers and track day use
Made from high-strength steel alloy with precise heat treatment for maximum durability.
Significantly improved traction when accelerating out of corners and greater stability during load changes.
The MZ191-HA offers exceptionally controllable locking characteristics – no aggressive “jerking,” just predictable power transmission.
Technical data (depending on model)
Type: Multi-plate limited slip differential
Design: 1.5-way

Recommendation
For optimal performance, we recommend using OS Giken 250R 80W-250 differential oil (OS011-KA1).
The OS Giken MZ191-HA Super Lock LSD is the ideal choice for MX-5 ND drivers looking for maximum performance, durability, and control. Whether you are an ambitious road driver or track day pilot, this limited-slip differential takes the MX-5's driving dynamics to a new level.