How much power will the R2C hold?

OS Giken USA rates the R2C Clutch for K-Series S2000 Gearbox at about 750 lb-ft of torque, and OS Giken Japan places the R range in its 700 PS class. That is the top of the OS Giken clutch range, built for competition engines.

It is the OS Giken model code. R is the cover series, 2 is the number of discs and C is the 215mm disc size. The R series uses a floating solid center hub rather than a D suffix. The same code system runs across the whole OS Giken clutch range.

Is the R2C usable on the street?

It is a race clutch. Engagement is firm and abrupt, and it passes more noise and driveline shock than a street clutch. It can be driven on the road, but most owners fit it to cars used mainly at events or the track.

Can the R2C Clutch for K-Series S2000 Gearbox be rebuilt?

Yes. OS Giken sells Overhaul Kit A (HA081-BH640A), with new discs, center plates, pressure plate and cover bolts, and Overhaul Kit B (HA081-BH640B), which adds a new cover. Our team can order either kit when the clutch needs service. Kit B is the choice when the cover is also worn.

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Description

OS Giken R2C Clutch for K-Series S2000 Gearbox Honda Acura RSX Civic Si, Twin Plate, With Flywheel

OS Giken’s R2C Clutch for K-Series S2000 Gearbox models is the twin plate clutch from OS Giken’s R series, built around two 215mm discs and an R series cover on OS Giken’s floating solid center hub. OS Giken USA rates it at about 750 lb-ft. OS Giken USA describes the R series as its highest capacity clutch, built to withstand transmission shock and abuse from high-powered race cars. OS Giken USA says the R2C is often found in its own competition drift and drag vehicles.

Where It Sits in the Range

The R2C Clutch for K-Series S2000 Gearbox cars is one of several OS Giken clutches listed for the K20 and K24 RSX and Civic. The HTR2C (about 650 lb-ft), STR2C (about 575 lb-ft) and TS2BS (about 500 lb-ft) cover other points in the range, so the choice comes down to power, pedal feel and how the car is used.

How OS Giken Japan Lists It

OS Giken USA and Turn 14 list the R2C with flywheel for a K-series engine mated to the S2000 gearbox. That is a swap application, so our team will confirm the engine, gearbox and release parts before the order is placed.

Features

Two 215mm discs
Floating solid center hub to withstand transmission shock
Rated by OS Giken USA at about 750 lb-ft
Rebuildable with OS Giken overhaul kits

Applications

Acura RSX Type-S: DC5 | 2002-2006 | 2.0L K20A2 / K20Z1
Honda Civic Si: EP3 | 2002-2005 | 2.0L K20A3
Honda Civic Type R: EP3 / FD2 / FN2 | 2001-2011 | 2.0L K20A, as listed by OS Giken Japan

Notes

OS Giken rebuild parts for this clutch are Overhaul Kit A (HA081-BH640A) and Overhaul Kit B (HA081-BH640B)
Installation labor is not included

Frequently Asked Questions

How much power will the R2C hold? OS Giken USA rates the R2C Clutch for K-Series S2000 Gearbox at about 750 lb-ft of torque, and OS Giken Japan places the R range in its 700 PS class. That is the top of the OS Giken clutch range, built for competition engines.
Who is the R2C made for? OS Giken USA describes the R series as its highest capacity clutch, built to withstand transmission shock and abuse from high-powered race cars. On the K20 and K24 RSX and Civic it suits owners who want the most capacity OS Giken makes.
What does R2C mean? It is the OS Giken model code. R is the cover series, 2 is the number of discs and C is the 215mm disc size. The R series uses a floating solid center hub rather than a D suffix. The same code system runs across the whole OS Giken clutch range.
Is the R2C usable on the street? It is a race clutch. Engagement is firm and abrupt, and it passes more noise and driveline shock than a street clutch. It can be driven on the road, but most owners fit it to cars used mainly at events or the track.
Can the R2C Clutch for K-Series S2000 Gearbox be rebuilt? Yes. OS Giken sells Overhaul Kit A (HA081-BH640A), with new discs, center plates, pressure plate and cover bolts, and Overhaul Kit B (HA081-BH640B), which adds a new cover. Our team can order either kit when the clutch needs service. Kit B is the choice when the cover is also worn.

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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BP Pricing Difference

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OS Giken R2C Clutch for K-Series S2000 Gearbox Honda Acura RSX Civic Si, Twin Plate, With Flywheel [HA081-BH64]

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OS Giken R2C Clutch for K-Series S2000 Gearbox Honda Acura RSX Civic Si, Twin Plate, With Flywheel

Where It Sits in the Range

How OS Giken Japan Lists It

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews