Does the R4C Clutch for JZA80 need anything else to fit?

Yes. The R4C Clutch for JZA80 is a push-type clutch and the JZA80 six-speed uses a pull-type release from the factory, so it is installed with the OS Giken Movement Alteration Kit for JZA80 (TY031-ALT). Turn 14 lists a kit as required; our team can confirm the pairing before you order.

How much power will it hold?

OS Giken USA rates the R4C at up to about 1,400 lb-ft of torque, and OS Giken Japan places the R series in its 700 PS class, the highest in its range. It is designed for competition engines and heavy heat loads.

It is the OS Giken model code. R is the cover series, 4 is the number of discs and C is the 215mm disc size. OS Giken USA describes the R4C center hub as floating and damped, built to absorb transmission shock in high-powered cars.

What kind of cars use it?

OS Giken USA says the R4C is often found in its competition drift and drag vehicles and in Dakar Rally type vehicles. On a JZA80 that usually means a dedicated drift, drag or roll-racing car with a heavily built 2JZ-GTE.

Can it be rebuilt when it wears?

Yes. OS Giken offers Overhaul Kit A, with the discs, center plates, pressure plate and cover bolts, and Overhaul Kit B, which adds a new cover. Rebuilding restores full clamping capacity for less than the cost of a complete new clutch.

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Description

OS Giken R4C Clutch for JZA80 Toyota Supra 2JZ-GTE, Quad Plate Race Clutch

OS Giken’s R4C Clutch for JZA80 Supra builds is the quad plate version of OS Giken’s highest capacity R series, rated by OS Giken USA at up to about 1,400 lb-ft of torque and able to absorb immense amounts of heat. OS Giken USA notes that the R4C is often found in its competition drift and drag vehicles, as well as in Dakar Rally type vehicles. Four 215mm discs and OS Giken’s floating, damped center hub are built to withstand the transmission shock of a high-powered race car, which is exactly what a big 2JZ-GTE delivers on a hard launch or a clutch kick.

Built for Competition Use

The R4C is the top of the JZA80 clutch range at OS Giken. For a little less capacity and one fewer disc, the R3C for JZA80 is also listed, and for a gearbox with a 26-spline input the 26-spline R4C for JZA80 is available. Rebuild parts include R4C Overhaul Kit B for JZA80.

Features

Four 215mm discs for maximum clamping capacity
Rated by OS Giken USA at about 1,400 lb-ft
Floating, damped center hub to absorb transmission shock
Used by OS Giken in competition drift and drag vehicles
Rebuildable with OS Giken overhaul kits A and B

Applications

Toyota Supra: JZA80 | 1993-1998 | 3.0L 2JZ-GTE twin turbo

Notes

This R4C Clutch for JZA80 installation requires the OS Giken Movement Alteration Kit for JZA80, sold separately
Rebuild with the R4C Overhaul Kit B for JZA80; OS Giken also offers Overhaul Kit A (TY031-DH50A)
Installation labor is not included

Frequently Asked Questions

Does the R4C Clutch for JZA80 need anything else to fit? Yes. The R4C Clutch for JZA80 is a push-type clutch and the JZA80 six-speed uses a pull-type release from the factory, so it is installed with the OS Giken Movement Alteration Kit for JZA80 (TY031-ALT). Turn 14 lists a kit as required; our team can confirm the pairing before you order.
How much power will it hold? OS Giken USA rates the R4C at up to about 1,400 lb-ft of torque, and OS Giken Japan places the R series in its 700 PS class, the highest in its range. It is designed for competition engines and heavy heat loads.
What does R4C mean? It is the OS Giken model code. R is the cover series, 4 is the number of discs and C is the 215mm disc size. OS Giken USA describes the R4C center hub as floating and damped, built to absorb transmission shock in high-powered cars.
What kind of cars use it? OS Giken USA says the R4C is often found in its competition drift and drag vehicles and in Dakar Rally type vehicles. On a JZA80 that usually means a dedicated drift, drag or roll-racing car with a heavily built 2JZ-GTE.
Can it be rebuilt when it wears? Yes. OS Giken offers Overhaul Kit A, with the discs, center plates, pressure plate and cover bolts, and Overhaul Kit B, which adds a new cover. Rebuilding restores full clamping capacity for less than the cost of a complete new clutch.

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.

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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 R4C Clutch for JZA80 Toyota Supra 2JZ-GTE, Quad Plate Race Clutch [TY031-DH5]

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OS Giken R4C Clutch for JZA80 Toyota Supra 2JZ-GTE, Quad Plate Race Clutch

Built for Competition Use

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

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