Which Super Lock LSD for Z33 cars do I need?

OS Giken USA lists two units. This Super Lock LSD for Z33 and Z34 cars, part number NS111-HA, replaces the factory viscous LSD. Cars that left the factory with an open differential take NS112-HA. Check the build of the car, or ask Bulletproof Automotive with the VIN, before ordering.

Why replace a viscous LSD?

A viscous unit only begins to lock once one wheel is already turning faster than the other, and its fluid loses effect as it heats up on track. A clutch-type differential locks with torque instead, so drive is immediate on corner exit and stays consistent through a full session.

Is it suitable for drifting a 350Z or 370Z?

Yes. A clutch-type rear differential locks both wheels under power, making slides easier to start and hold than with the viscous unit. OS Giken can retune initial torque and lock timing for a more aggressive drift setting if needed. It holds that setting through a full session.

Will it be noisy on the street?

OS Giken sets the Super Lock with a low preload that still reaches full lock progressively, and its Japanese catalogue describes it as one of the quietest LSDs in town. Light plate noise in tight parking turns is normal for any clutch-type differential.

Does it fit automatic cars?

No. This unit is listed for manual-transmission Zs only. Automatic 370Z cars with the 3.357 final drive take a separate OS Giken unit, part number NS114-HA, because the automatic gearbox uses a different final drive ratio from the manual car.

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Description

OS Giken Super Lock LSD for Z33 Nissan 350Z and Z34 370Z with Factory VLSD

OS Giken’s Super Lock LSD for Z33 Nissan 350Z and Z34 370Z with Factory VLSD replaces the viscous limited-slip unit fitted to many manual Zs, which works well enough on the street but softens with heat after a few hard laps. A viscous coupling only reacts once the inside rear tire is already spinning faster than the outside one, so the V6’s torque escapes before the diff locks. The Super Lock clamps through OS Giken’s patented pressure ring as torque rises, so drive is there from the moment the throttle opens. It is the right part for a Z that sees track days, drift practice or time attack.

Design and Performance

The friction plates run on splines through the side gears, fitting up to twice as many as rival designs, which lets OS Giken set a light preload for road use with full, progressive lock under power. The case is machined from a single billet and all gears are raw-forged and chemically heat treated.

Features

Clutch-type replacement for the factory viscous LSD
Patented pressure ring for lock that rises with torque
Up to twice the plate count of competing designs
Holds its behavior through long track sessions
Billet case and raw-forged gears
Retunable for initial torque, lock timing and ramp angle

Applications

Nissan 350Z: Z33 | 2003-2009 | 3.5L VQ35DE / VQ35HR
Nissan 370Z: Z34 | 2009-2020 | 3.7L VQ37VHR

Notes

This Super Lock LSD for Z33 and Z34 cars is the version for cars built with the factory viscous LSD; cars with an open differential take part number NS112-HA
Listed for manual-transmission cars
Installation labor is not included

Frequently Asked Questions

Which Super Lock LSD for Z33 cars do I need? OS Giken USA lists two units. This Super Lock LSD for Z33 and Z34 cars, part number NS111-HA, replaces the factory viscous LSD. Cars that left the factory with an open differential take NS112-HA. Check the build of the car, or ask Bulletproof Automotive with the VIN, before ordering.
Why replace a viscous LSD? A viscous unit only begins to lock once one wheel is already turning faster than the other, and its fluid loses effect as it heats up on track. A clutch-type differential locks with torque instead, so drive is immediate on corner exit and stays consistent through a full session.
Is it suitable for drifting a 350Z or 370Z? Yes. A clutch-type rear differential locks both wheels under power, making slides easier to start and hold than with the viscous unit. OS Giken can retune initial torque and lock timing for a more aggressive drift setting if needed. It holds that setting through a full session.
Will it be noisy on the street? OS Giken sets the Super Lock with a low preload that still reaches full lock progressively, and its Japanese catalogue describes it as one of the quietest LSDs in town. Light plate noise in tight parking turns is normal for any clutch-type differential.
Does it fit automatic cars? No. This unit is listed for manual-transmission Zs only. Automatic 370Z cars with the 3.357 final drive take a separate OS Giken unit, part number NS114-HA, because the automatic gearbox uses a different final drive ratio from the manual car.

About OS Giken

OS Giken was founded in Okayama, Japan in 1973 by Masaharu Okazaki. It built the TC16 and TC24-B1 DOHC cylinder heads for Nissan L-series engines, began making multi-plate racing clutches in 1982 and started supplying OEM limited-slip differentials in 1983. Development of the Super Lock LSD began in 1997, and of the OS-88 sequential gearbox for the Skyline GT-R in 1998.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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OS Giken Super Lock LSD for Z33 Nissan 350Z and Z34 370Z with Factory VLSD [NS111-HA]

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OS Giken Super Lock LSD for Z33 Nissan 350Z and Z34 370Z with Factory VLSD

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews