Which cars does the Super Lock LSD for E46 318i fit?

OS Giken USA titles the Super Lock LSD for E46 318i models for the E46 318i, and Turn 14 lists the E46 316ti and 320i automatics and the E90 320i. OS Giken Japan lists these cars with open differentials. Confirm your model and engine before ordering.

Does it fit a US-market E46 323i, 325i or 328i?

The six-cylinder E46 323i, 325i, 328i and 330i appear on the OS Giken Japan list with a note that the carrier must be machined to fit. Contact our team before ordering for one of these cars so we can confirm the right unit and fitting work with OS Giken.

Why are additional parts needed?

OS Giken Japan notes that extra parts are needed to install the unit in these BMWs and that the factory side bearings are no longer made, so the originals are reused. Our team can check with OS Giken what is needed for your car.

Will it be noisy on the street?

Plate-type differentials can make some noise and chatter in tight, slow turns such as parking. The Super Lock pressure ring is designed for smooth, progressive locking, and the right oil, changed on schedule, keeps noise to a minimum on a daily driven car.

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 and helps the unit last longer between rebuilds.

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Description

OS Giken Super Lock LSD for E46 318i, 316ti and 320i and E90 320i BMW

OS Giken’s Super Lock LSD for E46 318i models is a plate-type limited-slip differential for the four-cylinder and smaller six-cylinder E46 and E90 BMW 3 Series, which left the factory with an open differential. OS Giken USA titles it for the E46 318i, and Turn 14 lists the E46 316ti and 320i automatics and the E90 320i manual and automatic. These are light, rear-drive cars with a well-balanced chassis, and an open differential lets the inside rear wheel spin away drive out of tight corners, on track or on a wet road. The Super Lock ties the rear wheels together progressively, so the car drives out of corners rather than spinning a tire.

Fitting Notes From OS Giken

OS Giken Japan lists these cars as a fit without machining, but says additional parts are needed for installation and that the factory side bearings are discontinued by BMW, so the existing bearings are reused. Turn 14 also lists the US E36 318i for this part; confirm with our team before ordering for an E36.

Features

Patented OS Giken pressure ring for smooth, progressive lock
Spline-through-side-gear design fits more friction plates
Up to twice the friction plates of competing designs
Chemically heat-treated, high-grade steel alloy components
Replaces the open differential in small-case E46 and E90 cars
Retunable by OS Giken for street or circuit

Applications

BMW 318i / 318ti / 316ti (E46): Four-cylinder, open differential
BMW 320i (E46): Automatic, open differential
BMW 320i (E90): N46 four-cylinder, manual or automatic

Notes

This Super Lock LSD for E46 318i and related models replaces a factory open differential
OS Giken Japan says additional parts are needed and the original side bearings are reused
Turn 14 lists 1996-1998 US E36 318i fitment, which OS Giken has not confirmed for this part
Installation labor is not included

Frequently Asked Questions

Which cars does the Super Lock LSD for E46 318i fit? OS Giken USA titles the Super Lock LSD for E46 318i models for the E46 318i, and Turn 14 lists the E46 316ti and 320i automatics and the E90 320i. OS Giken Japan lists these cars with open differentials. Confirm your model and engine before ordering.
Does it fit a US-market E46 323i, 325i or 328i? The six-cylinder E46 323i, 325i, 328i and 330i appear on the OS Giken Japan list with a note that the carrier must be machined to fit. Contact our team before ordering for one of these cars so we can confirm the right unit and fitting work with OS Giken.
Why are additional parts needed? OS Giken Japan notes that extra parts are needed to install the unit in these BMWs and that the factory side bearings are no longer made, so the originals are reused. Our team can check with OS Giken what is needed for your car.
Will it be noisy on the street? Plate-type differentials can make some noise and chatter in tight, slow turns such as parking. The Super Lock pressure ring is designed for smooth, progressive locking, and the right oil, changed on schedule, keeps noise to a minimum on a daily driven car.
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 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 E46 318i, 316ti and 320i and E90 320i BMW [BM225-HA]

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OS Giken Super Lock LSD for E46 318i, 316ti and 320i and E90 320i BMW

Fitting Notes From OS Giken

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

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