Which cars does the Super Lock LSD for LX SRT8 models fit?

Turn 14 lists the Super Lock LSD for LX and LC SRT8 cars, part number CR031-HA, for the 2005-2010 Chrysler 300C SRT8, the 2006-2010 Dodge Charger SRT8, the 2006-2008 Magnum SRT8 and the 2008-2010 Challenger SRT8, all with the automatic transmission.

Is it good for drag racing?

Yes. A clutch-type differential locks both rear wheels as torque rises, so both tires drive off the line instead of one spinning. On a heavy HEMI car that gives straighter, more consistent launches, and OS Giken can raise initial torque for dedicated drag use.

Does it fit manual Challengers?

It is listed for automatic cars only. Turn 14 and OS Giken USA do not list the six-speed manual Challenger SRT8 for this part number, so it should not be assumed to fit. Bulletproof Automotive can help confirm what a manual car needs before anything is ordered.

Will it change daily driving?

Very little. OS Giken sets the Super Lock with a modest preload, and its Japanese catalogue rates the design among the quietest LSDs in town. The difference appears on launches and hard corner exits, not in normal traffic. Commuting is unaffected.

Can it be serviced later?

Yes. The friction plates wear slowly with use, and OS Giken rebuilds and retunes Super Lock units in-house, changing initial torque and lock timing so the differential can follow the car as it is modified. Ask us about rebuild intervals.

Description

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Description

OS Giken Super Lock LSD for LX Chrysler 300C SRT8 and Dodge Charger / Magnum / Challenger SRT8 Automatic

OS Giken’s Super Lock LSD for LX Chrysler 300C SRT8 and Dodge Charger / Magnum / Challenger SRT8 Automatic covers the first wave of HEMI-powered SRT8 cars, all sharing the same rear axle behind a five-speed automatic. A 6.1-liter SRT8 is a heavy car with a lot of torque, and on a drag launch or a hard exit from a slow corner the factory differential lets the inside rear tire spin while the stability control cuts power. OS Giken’s patented pressure ring locks both rear wheels progressively as torque builds. It suits an SRT8 that sees the drag strip, autocross or track days.

Design and Performance

OS Giken carries the friction plates on splines through the side gears, giving up to twice the plate count of competing designs and the clamping area a heavy, high-torque car needs. A modest preload keeps the car smooth in traffic, and full lock builds progressively under power. Gears are raw-forged in a billet case.

Features

Clutch-type rear differential for 6.1L HEMI SRT8 cars
Clamping area sized for heavy, high-torque sedans and coupes
Patented pressure ring for progressive lock
Up to twice the friction plates of competing designs
Billet case and raw-forged gears
Retunable for drag, autocross or circuit use

Applications

Chrysler 300C SRT8: LX | 2005-2010 | 6.1L HEMI V8, automatic
Dodge Challenger SRT8: LC | 2008-2010 | 6.1L HEMI V8, automatic
Dodge Charger SRT8: LX | 2006-2010 | 6.1L HEMI V8, automatic
Dodge Magnum SRT8: LX | 2006-2008 | 6.1L HEMI V8, automatic

Notes

The Super Lock LSD for LX and LC SRT8 cars is listed for automatic-transmission cars
Installation labor is not included

Frequently Asked Questions

Which cars does the Super Lock LSD for LX SRT8 models fit? Turn 14 lists the Super Lock LSD for LX and LC SRT8 cars, part number CR031-HA, for the 2005-2010 Chrysler 300C SRT8, the 2006-2010 Dodge Charger SRT8, the 2006-2008 Magnum SRT8 and the 2008-2010 Challenger SRT8, all with the automatic transmission.
Is it good for drag racing? Yes. A clutch-type differential locks both rear wheels as torque rises, so both tires drive off the line instead of one spinning. On a heavy HEMI car that gives straighter, more consistent launches, and OS Giken can raise initial torque for dedicated drag use.
Does it fit manual Challengers? It is listed for automatic cars only. Turn 14 and OS Giken USA do not list the six-speed manual Challenger SRT8 for this part number, so it should not be assumed to fit. Bulletproof Automotive can help confirm what a manual car needs before anything is ordered.
Will it change daily driving? Very little. OS Giken sets the Super Lock with a modest preload, and its Japanese catalogue rates the design among the quietest LSDs in town. The difference appears on launches and hard corner exits, not in normal traffic. Commuting is unaffected.
Can it be serviced later? Yes. The friction plates wear slowly with use, and OS Giken rebuilds and retunes Super Lock units in-house, changing initial torque and lock timing so the differential can follow the car as it is modified. Ask us about rebuild intervals.

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 LX Chrysler 300C SRT8 and Dodge Charger / Magnum / Challenger SRT8 Automatic [CR031-HA]

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OS Giken Super Lock LSD for LX Chrysler 300C SRT8 and Dodge Charger / Magnum / Challenger SRT8 Automatic

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews