Which cars does the Super Lock LSD for 986 Boxster S fit?

OS Giken Japan lists the Super Lock LSD for 986 Boxster S models for the first-generation Boxster S with the six-speed manual. Turn 14 lists the US 2000 to 2003 Boxster S. Confirm the gearbox in your car before ordering.

Does it fit the base 986 Boxster?

No. The base 986 Boxster uses a five-speed transaxle and takes a different OS Giken unit, which is chosen by the inner diameter of the side bearings. Contact our team and we can help identify the right unit for a base Boxster.

Will it make the car harder to drive on the road?

No. OS Giken designed the Porsche Super Lock to suit both circuit and street use, moving smoothly from open to full lock, with pressure ring springs set to reduce drag at low speed. Expect some noise in tight parking maneuvers.

Can OS Giken tune it for my car?

Yes. OS Giken retunes Super Lock units in-house. Cone springs set initial torque, pressure ring springs set how quickly full lock arrives, and the pressure ring and iron cross set the ramp angles, so the unit can be matched to weight, power and use.

Does it fit Tiptronic or PTV Plus cars?

No. OS Giken Japan states that Tiptronic cars are not compatible, that cars with a factory LSD other than PDK cars are not compatible, and that cars with Porsche Torque Vectoring Plus cannot be fitted. Check the options on your car before ordering.

What oil should be used?

Use a gear oil suited to clutch-type limited-slip differentials, and change it more often than with an open differential, especially after track use. Fresh oil keeps the friction plates working consistently, reduces chatter during slow turns and helps the unit last longer between rebuilds.

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Description

OS Giken Super Lock LSD for 986 Boxster S 6MT

OS Giken’s Super Lock LSD for 986 Boxster S models is a plate-type limited-slip differential for the first-generation Porsche Boxster S with the six-speed manual transaxle. OS Giken Japan lists it for the 986 Boxster S six-speed, and Turn 14 lists the US 2000-2003 Boxster S. The mid-engine Boxster S is balanced and quick through corners, but an open differential lets the inside rear wheel spin away drive on corner exit, especially on track or with sticky tires. The Super Lock builds lock smoothly and progressively, putting power down evenly and keeping the rear settled on and off throttle, so the car can be driven out of corners harder.

Boxster S Versus Base Boxster

The base 986 Boxster uses a five-speed transaxle and takes a different OS Giken unit, chosen by side-bearing size. This unit is for the six-speed Boxster S only, so confirm the model and gearbox before ordering.

Features

Patented OS Giken pressure ring for smooth, progressive lock
Moves smoothly from open to full lock without extra slip on throttle
Pressure ring springs tuned against low-speed drag
Large-capacity friction plates and OS Giken side gear shape
Chemically heat-treated, high-grade steel alloy components
Built for the 986 Boxster S six-speed manual

Applications

Porsche Boxster S (986): Six-speed manual, listed 2000-2003

Notes

This Super Lock LSD for 986 Boxster S models is for six-speed manual cars
Turn 14 titles this part as the G50-type unit for the 986 Boxster S; the base 986 Boxster five-speed takes a different unit
OS Giken Japan lists Tiptronic cars, PTV Plus cars and cars with a factory LSD (other than PDK) as not compatible
Installation labor is not included

Frequently Asked Questions

Which cars does the Super Lock LSD for 986 Boxster S fit? OS Giken Japan lists the Super Lock LSD for 986 Boxster S models for the first-generation Boxster S with the six-speed manual. Turn 14 lists the US 2000 to 2003 Boxster S. Confirm the gearbox in your car before ordering.
Does it fit the base 986 Boxster? No. The base 986 Boxster uses a five-speed transaxle and takes a different OS Giken unit, which is chosen by the inner diameter of the side bearings. Contact our team and we can help identify the right unit for a base Boxster.
Will it make the car harder to drive on the road? No. OS Giken designed the Porsche Super Lock to suit both circuit and street use, moving smoothly from open to full lock, with pressure ring springs set to reduce drag at low speed. Expect some noise in tight parking maneuvers.
Can OS Giken tune it for my car? Yes. OS Giken retunes Super Lock units in-house. Cone springs set initial torque, pressure ring springs set how quickly full lock arrives, and the pressure ring and iron cross set the ramp angles, so the unit can be matched to weight, power and use.
Does it fit Tiptronic or PTV Plus cars? No. OS Giken Japan states that Tiptronic cars are not compatible, that cars with a factory LSD other than PDK cars are not compatible, and that cars with Porsche Torque Vectoring Plus cannot be fitted. Check the options on your car before ordering.
What oil should be used? Use a gear oil suited to clutch-type limited-slip differentials, and change it more often than with an open differential, especially after track use. Fresh oil keeps the friction plates working consistently, reduces chatter during slow turns and helps the unit last longer between rebuilds.

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 986 Boxster S 6MT [PR133-HA]

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OS Giken Super Lock LSD for 986 Boxster S 6MT

Boxster S Versus Base Boxster

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

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