SKU: MZ091-HA
OS Giken Mazda Miata NC (MT Only) Super Lock LSD MZ091-HA 2006-2014 MX-5 Miata
The OS Giken Super Lock LSD MZ091-HA is a clutch-type limited slip differential built for Mazda Miata NC models with 6-speed manual transmission. It installs directly in place of the stock open differential on 2006-2014 MX-5 Miata including Base, Touring, Grand Touring, Sport, Club, SV, Club Spec, and Special Edition trims. Drivers gain immediate traction from corners with both drive wheels gripping evenly plus reduced understeer for sharper handling response.
Key Features
- 2-Way Clutch Operation: Engages on acceleration and deceleration to distribute power evenly between wheels for consistent grip in all driving conditions.
- Forged 4340 Steel Side Gears: Deliver high strength and resistance to shock loads during hard launches and track abuse.
- High Carbon Steel Clutch Plates: Provide six plates per side with maximum friction coefficient for quick lockup and long-term durability.
- Optimized Ramp Angles Stage 1: 42-degree drive and 28-degree coast angles set initial torque at 50-80 kgf-cm for smooth predictable performance on street or circuit.
- Shortened Pinion Shaft: Allows direct connection to factory propeller shaft without modifications for plug-and-play fitment.
Product Notes
- Requires 1.3 liters of OS Giken LSD oil or equivalent 75W-90 GL-5 gear oil after installation.
- Break-in period of 500 miles with no aggressive driving recommended for clutch bedding.
- Heavy precision component ships via ground freight in reinforced packaging.
Installation Notes
- Professional installation recommended.
- Drain stock differential fluid completely before removal and inspect carrier bearings.
- Factory torque specs apply to side bearing preload and pinion nut 240-260 Nm.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2006-2012 | Mazda | MX-5 Miata | Touring |
| 2006 | Mazda | MX-5 Miata | Base |
| 2013-2014 | Mazda | MX-5 Miata | Club |
| 2006 | Mazda | MX-5 Miata | Club Spec |
| 2006-2014 | Mazda | MX-5 Miata | Grand Touring |
| 2011-2012 | Mazda | MX-5 Miata | Special Edition |
| 2006-2014 | Mazda | MX-5 Miata | Sport |
| 2007-2009 | Mazda | MX-5 Miata | SV |
Why Choose OS Giken?
- Japanese racing differential leader supplying Super Lock LSD to professional drift and time attack teams worldwide.
- Hand-assembled with tight tolerances for zero play and reliable lockup under extreme conditions.
- Proven design from Super Taikyu endurance racing with focus on street-friendly response.
Frequently Asked Questions
- Q: Will this LSD fit automatic transmission Miata NC models?
A: No, MZ091-HA fits only 6-speed manual transmission differentials on 2006-2014 MX-5 Miata NC chassis. - Q: What materials are used in the clutch plates and gears?
A: Clutch plates are high carbon steel for superior wear resistance, side gears forged from 4340 alloy steel for maximum toughness. - Q: What maintenance is needed post-installation?
A: Change differential fluid every 15,000 miles or after track days, inspect clutch wear during fluid changes.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure double-walled box 16 x 16 x 16 inches
- Weight: 43 lbs
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