Which clutch uses the Movement Alteration Kit for JZA70 28mm sleeve?

OS Giken makes the Movement Alteration Kit for JZA70 28mm sleeve installs alongside a 25mm version, but neither Turn 14 nor OS Giken USA publishes which JZA70 clutches use the 28mm sleeve. Tell us which OS Giken clutch you have and we will confirm it with OS Giken.

Can I use it with another brand of clutch?

No. OS Giken states that its Movement Alteration Kits are designed to work with OS Giken clutches, and that using one in an unintended application can cause clutch components to fail. Use it only with the clutch it is listed for.

Should it be installed with the clutch?

Yes. The kit changes how the release system operates, so it goes in during the same job as the clutch. Have both fitted by a shop familiar with multi-plate clutches, following the instructions OS Giken supplies with the parts. Our team can help with any questions.

Is the release sleeve replaceable?

Yes. OS Giken sells a replacement 28mm release sleeve assembly for this kit under part number TY021-ALT28K, so a worn sleeve can be replaced without buying the whole kit again. Ask our team if you need one. Our team can help with any questions.

What does a Movement Alteration Kit do?

It adapts the pull-type clutch release the 1JZ-GTE JZA70 had from the factory so it can operate a push-type OS Giken clutch. A pull-type release draws the bearing away from the engine, while a push-type clutch is released by pressing toward it.

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Description

OS Giken Movement Alteration Kit for JZA70 28mm Sleeve, Toyota Supra 1JZ-GTE R154

OS Giken’s Movement Alteration Kit for JZA70 28mm sleeve installs is the longer-sleeve version of the release conversion OS Giken makes for the 1JZ-GTE JZA70 Supra with the R154 gearbox. Like the 25mm kit, it lets a push-type OS Giken clutch work with the pull-type release the car had from the factory, and it is designed for OS Giken clutches only. The sleeve length has to suit the clutch it works with, and OS Giken publishes the 25mm pairing but not the 28mm one, so this kit is supplied after we confirm with OS Giken that it matches the clutch you are fitting.

Choosing 25mm or 28mm

OS Giken makes the JZA70 Movement Alteration Kit with two release sleeve lengths. Turn 14 lists the 25mm sleeve kit with the OS Giken TR2CD clutch. Neither Turn 14 nor OS Giken USA publishes which JZA70 clutches take the 28mm sleeve, so we confirm it with OS Giken for your clutch before the order is placed.

Features

Converts the R154 JZA70 release for a push-type OS Giken clutch
Built around a 28mm release sleeve
Designed to work with OS Giken clutches only
Replacement 28mm release sleeve available separately

Applications

Toyota Supra: JZA70 | 1990-1993 | 2.5L 1JZ-GTE, R154 | with a push-type OS Giken clutch that uses the 28mm sleeve

Notes

This Movement Alteration Kit for JZA70 28mm sleeve installs is for push-type OS Giken clutches only
Which JZA70 clutches use the 28mm sleeve is not published; our team confirms it with OS Giken before ordering
OS Giken also sells a replacement 28mm release sleeve assembly (TY021-ALT28K)
Installation labor is not included

Frequently Asked Questions

Which clutch uses the Movement Alteration Kit for JZA70 28mm sleeve? OS Giken makes the Movement Alteration Kit for JZA70 28mm sleeve installs alongside a 25mm version, but neither Turn 14 nor OS Giken USA publishes which JZA70 clutches use the 28mm sleeve. Tell us which OS Giken clutch you have and we will confirm it with OS Giken.
Can I use it with another brand of clutch? No. OS Giken states that its Movement Alteration Kits are designed to work with OS Giken clutches, and that using one in an unintended application can cause clutch components to fail. Use it only with the clutch it is listed for.
Should it be installed with the clutch? Yes. The kit changes how the release system operates, so it goes in during the same job as the clutch. Have both fitted by a shop familiar with multi-plate clutches, following the instructions OS Giken supplies with the parts. Our team can help with any questions.
Is the release sleeve replaceable? Yes. OS Giken sells a replacement 28mm release sleeve assembly for this kit under part number TY021-ALT28K, so a worn sleeve can be replaced without buying the whole kit again. Ask our team if you need one. Our team can help with any questions.
What does a Movement Alteration Kit do? It adapts the pull-type clutch release the 1JZ-GTE JZA70 had from the factory so it can operate a push-type OS Giken clutch. A pull-type release draws the bearing away from the engine, while a push-type clutch is released by pressing toward it.

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

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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 Movement Alteration Kit for JZA70 28mm Sleeve, Toyota Supra 1JZ-GTE R154 [TY021-ALT28]

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OS Giken Movement Alteration Kit for JZA70 28mm Sleeve, Toyota Supra 1JZ-GTE R154

Choosing 25mm or 28mm

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews