How much power will the TR2A hold?

OS Giken USA rates the TR2A Clutch for Alfetta 2000 at about 350 lb-ft of torque, and OS Giken Japan places the TR range in its 600 PS class. For more power than that, a higher capacity OS Giken series is the better match.

It is the OS Giken model code. TR is the cover series, 2 is the number of discs and A is the 184mm disc size. There is no D, so the discs have solid hubs for direct engagement. The same code system runs across the whole OS Giken clutch range.

Is the TR2A easy to drive on the street?

The billet aluminum cover gives a more direct pedal, and OS Giken shaped the diaphragm spring to reduce overall pedal effort. Expect firmer engagement than a factory clutch, but it remains usable on the street. The aluminum cover also allows a higher clamping force for track use.

Can the TR2A Clutch for Alfetta 2000 be rebuilt?

Yes. OS Giken USA sells Overhaul Kit A (AR151-BF1EA) and Overhaul Kit B (AR151-BF1EB) for this clutch, with Kit B adding a new cover. Our team can order either kit when the clutch needs service, so it can be refreshed rather than replaced, and will confirm the contents for your car.

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Description

OS Giken TR2A Clutch for Alfetta 2000 Alfa Romeo, Twin Plate

OS Giken’s TR2A Clutch for Alfetta 2000 models is the twin plate clutch from OS Giken’s TR series, built around two 184mm discs with solid hubs and a billet aluminum cover for a more direct pedal and a higher clamping force. OS Giken USA rates it at about 350 lb-ft, and OS Giken designed the TR2A with naturally aspirated engines in mind. OS Giken USA describes the TR series as built for engines with substantial increases in power, with a diaphragm spring shaped to reduce overall pedal effort. OS Giken USA notes that this is typically the lightest clutch and flywheel assembly for most applications.

Where It Sits in the Range

The TR2A Clutch for Alfetta 2000 cars is one of several OS Giken clutches listed for the Alfa Romeo Alfetta 2000 twin cam with hydraulic release. The TR1A (about 250 lb-ft) covers other points in the range, so the choice comes down to power, pedal feel and how the car is used.

Features

Two 184mm discs with solid hubs
Billet aluminum TR cover for a higher clamping force
Rated by OS Giken USA at about 350 lb-ft
Designed with naturally aspirated engines in mind
Rebuildable with OS Giken overhaul kits

Applications

Alfa Romeo Alfetta: 2000 | 1977-1984 | 2.0L twin cam, hydraulic release

Notes

OS Giken rebuild parts for this clutch are Overhaul Kit A (AR151-BF1EA) and Overhaul Kit B (AR151-BF1EB)
Installation labor is not included

Frequently Asked Questions

How much power will the TR2A hold? OS Giken USA rates the TR2A Clutch for Alfetta 2000 at about 350 lb-ft of torque, and OS Giken Japan places the TR range in its 600 PS class. For more power than that, a higher capacity OS Giken series is the better match.
Who is the TR2A made for? OS Giken designed the TR2A with naturally aspirated engines in mind. OS Giken USA describes the TR series as built for engines with substantial increases in power, with a diaphragm spring shaped to reduce overall pedal effort. On the Alfa Romeo Alfetta 2000 twin cam with hydraulic release it suits owners who want more clamping force for a heavily modified engine.
What does TR2A mean? It is the OS Giken model code. TR is the cover series, 2 is the number of discs and A is the 184mm disc size. There is no D, so the discs have solid hubs for direct engagement. The same code system runs across the whole OS Giken clutch range.
Is the TR2A easy to drive on the street? The billet aluminum cover gives a more direct pedal, and OS Giken shaped the diaphragm spring to reduce overall pedal effort. Expect firmer engagement than a factory clutch, but it remains usable on the street. The aluminum cover also allows a higher clamping force for track use.
Can the TR2A Clutch for Alfetta 2000 be rebuilt? Yes. OS Giken USA sells Overhaul Kit A (AR151-BF1EA) and Overhaul Kit B (AR151-BF1EB) for this clutch, with Kit B adding a new cover. Our team can order either kit when the clutch needs service, so it can be refreshed rather than replaced, and will confirm the contents for your car.

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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