Which Super Lock LSD for Z33 cars fits an open-differential Z?

This one, part number NS112-HA. Many base-trim manual Zs left the factory with an open differential, while higher trims and option packages carried a viscous LSD. The build sheet or a VIN check confirms it, and Bulletproof Automotive can help identify which Super Lock LSD for Z33 and Z34 cars fits.

What changes over the open differential?

An open differential sends drive to the tire with less grip, so the inside rear spins once it unloads and the stability system cuts power. A clutch-type differential keeps both tires driving through the turn, which brings stronger corner exits and makes slides controllable.

Is it good for drifting?

Yes. Locking both rear wheels under power is what makes a car slide predictably, and an open differential cannot do it. The OS Giken unit makes slides easier to start, hold and link, and OS Giken can retune it for a more aggressive setting.

Will I notice it on the street?

Only a little. OS Giken sets the Super Lock with a low preload, and its Japanese catalogue describes the design as one of the quietest LSDs in town. Light plate noise in tight parking turns is normal for a clutch-type unit.

Does it fit the automatic 370Z?

No. This unit is listed for manual-transmission cars only. OS Giken lists the automatic 370Z with the 3.357 final drive separately, as part number NS114-HA, because the automatic gearbox uses a different final drive ratio from the manual car. Check the transmission type before ordering.

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Description

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

OS Giken’s Super Lock LSD for Z33 Nissan 350Z and Z34 370Z with Factory Open Differential is the version for Zs that left the factory without any limited-slip unit, which is where the gain is largest. An open differential sends torque to whichever rear tire has less grip, so a base 350Z or 370Z spins its inside rear the moment it is loaded in a corner and the stability control steps in. The Super Lock replaces that open unit with a clutch-type differential built around OS Giken’s patented pressure ring. For an open-diff Z that is headed to autocross, drift practice or the track, it is the first drivetrain change to make.

Design and Performance

OS Giken carries the friction plates on splines through the side gears, so the case holds up to twice as many as competing designs. That allows a modest preload for daily driving while still building smoothly to full lock under power. Gears are raw-forged and chemically heat treated inside a billet-machined case.

Features

Clutch-type replacement for the factory open differential
Patented OS Giken pressure ring for progressive lock
Up to twice the friction plates of competing designs
Street-friendly preload
Billet case and raw-forged gears
Retunable by OS Giken for drift or grip use

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 an open differential; cars with the factory viscous LSD take part number NS111-HA
Listed for manual-transmission cars
Installation labor is not included

Frequently Asked Questions

Which Super Lock LSD for Z33 cars fits an open-differential Z? This one, part number NS112-HA. Many base-trim manual Zs left the factory with an open differential, while higher trims and option packages carried a viscous LSD. The build sheet or a VIN check confirms it, and Bulletproof Automotive can help identify which Super Lock LSD for Z33 and Z34 cars fits.
What changes over the open differential? An open differential sends drive to the tire with less grip, so the inside rear spins once it unloads and the stability system cuts power. A clutch-type differential keeps both tires driving through the turn, which brings stronger corner exits and makes slides controllable.
Is it good for drifting? Yes. Locking both rear wheels under power is what makes a car slide predictably, and an open differential cannot do it. The OS Giken unit makes slides easier to start, hold and link, and OS Giken can retune it for a more aggressive setting.
Will I notice it on the street? Only a little. OS Giken sets the Super Lock with a low preload, and its Japanese catalogue describes the design as one of the quietest LSDs in town. Light plate noise in tight parking turns is normal for a clutch-type unit.
Does it fit the automatic 370Z? No. This unit is listed for manual-transmission cars only. OS Giken lists the automatic 370Z with the 3.357 final drive separately, as part number NS114-HA, because the automatic gearbox uses a different final drive ratio from the manual car. Check the transmission type before ordering.

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 Open Differential [NS112-HA]

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

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews