OS Giken Mazda FD3S RX-7 STR Twin Plate Clutch overhaul kit B (STR2C) Nissan Skyline GT-R (R34) -

Nissan Skyline GT-R (R34) - OS 88 Transmission

The clutch discs are 184mm in size and is good up to about 600lbs ft

Mazda RX-7 (SA22) - 12B

Nissan Fairlady/280Z (S30) - L6  (R200 Long Nose)

while the heat-treated alloy clutch discs improve durability and maximize performance

OS Giken Mazda FD3S RX-7 STR Twin Plate Clutch overhaul kit B (STR2C) Nissan Skyline GT-R (R34) -The STR Clutch line up was designed to hold high capacity power while still retaining a relatively light clutch pedal. This technology was driven from our racer's demand for a lighter clutch during long endurance races in Japan. Heavy clutch pedals lead to driver fatigue during long endurance racing. The STR2C Twin plate feature solid hub clutch disks to provide efficient transfer of power while providing reliability and strength under heavy abuse.