Does the Super Lock LSD for DC2 fit both the GS-R and the Type R?

Yes. OS Giken lists the Super Lock LSD for DC2 and EK9 cars, part number HA052-HA, for the B18C Integra and the B16B Civic Type R. In the US that covers the Integra GS-R with the B18C1 and the Integra Type R with the B18C5, both with manual transmissions.

Is it better than the factory Type R helical LSD?

For track use, yes. The helical unit only biases torque while both front tires carry load, so it stops working when an inside wheel lifts over a curb. The OS Giken clutch-type unit keeps transmitting torque through its plates in that moment, so the car pulls out of the corner harder.

What does 1.1-way mean here?

A 1.1-way LSD locks strongly on acceleration and only lightly on deceleration. OS Giken uses it on front-drive cars so turn-in and lift-off behavior stay close to stock, while drive out of the corner gets the full locking effect of the clutch plates.

Will the steering feel change?

A little. With both front tires driving there is more feedback through the wheel under hard acceleration. The low preload and progressive lock of the Super Lock keep this moderate, and on a track car the traction gain outweighs it.

Can it be serviced later?

Yes. The friction plates wear slowly with use, and OS Giken rebuilds and retunes Super Lock units in-house, adjusting initial torque, lock timing and ramp angle so the differential can be set up for a street car or a dedicated race car.

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Description

OS Giken Super Lock LSD for DC2 Acura Integra GS-R / Type R and EK9 Honda Civic Type R

OS Giken’s Super Lock LSD for DC2 Acura Integra GS-R / Type R and EK9 Honda Civic Type R serves the B18C and B16B cars that made Honda’s VTEC front-drivers a track-day staple. The GS-R left the factory with an open differential, and the Type R’s helical unit stops working the moment an inside front tire lifts over a curb, which a DC2 on stiff springs does often. OS Giken’s patented pressure ring keeps both front tires driving instead, and on front-drive cars the SPEC-S tune runs 1.1-way so turn-in is barely changed. For a B-series car that is raced or tracked, this is the drivetrain upgrade to make before chasing power.

Design and Performance

The plates run on splines through the side gears, so OS Giken fits up to twice as many as competing designs. That much friction area allows a light preload for the street with full, progressive lock under power. Gears are raw-forged and the case is machined from a single billet.

Features

Clutch-type front differential for B16B and B18C gearboxes
1.1-way action on front-drive cars in the SPEC-S tune
Patented OS Giken pressure ring for progressive lock
Up to twice the friction plates of competing designs
Billet case, raw-forged and chemically heat-treated parts
Retunable by OS Giken as the build changes

Applications

Acura Integra GS-R: DC2 | 1994-2001 | 1.8L B18C1
Acura Integra Type R: DC2 | 1997-2001 | 1.8L B18C5
Honda Civic Type R: EK9 | 1997-2000 | 1.6L B16B

Notes

The Super Lock LSD for DC2 and EK9 cars is listed for manual-transmission cars built from May 1993 to July 2001
Fitting requires removing and opening the transmission; installation labor is not included

Frequently Asked Questions

Does the Super Lock LSD for DC2 fit both the GS-R and the Type R? Yes. OS Giken lists the Super Lock LSD for DC2 and EK9 cars, part number HA052-HA, for the B18C Integra and the B16B Civic Type R. In the US that covers the Integra GS-R with the B18C1 and the Integra Type R with the B18C5, both with manual transmissions.
Is it better than the factory Type R helical LSD? For track use, yes. The helical unit only biases torque while both front tires carry load, so it stops working when an inside wheel lifts over a curb. The OS Giken clutch-type unit keeps transmitting torque through its plates in that moment, so the car pulls out of the corner harder.
What does 1.1-way mean here? A 1.1-way LSD locks strongly on acceleration and only lightly on deceleration. OS Giken uses it on front-drive cars so turn-in and lift-off behavior stay close to stock, while drive out of the corner gets the full locking effect of the clutch plates.
Will the steering feel change? A little. With both front tires driving there is more feedback through the wheel under hard acceleration. The low preload and progressive lock of the Super Lock keep this moderate, and on a track car the traction gain outweighs it.
Can it be serviced later? Yes. The friction plates wear slowly with use, and OS Giken rebuilds and retunes Super Lock units in-house, adjusting initial torque, lock timing and ramp angle so the differential can be set up for a street car or a dedicated race 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 DC2 Acura Integra GS-R / Type R and EK9 Honda Civic Type R [HA052-HA]

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OS Giken Super Lock LSD for DC2 Acura Integra GS-R / Type R and EK9 Honda Civic Type R

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews