Competition Clutch Stage 2 Steelback Brass Plus Clutch Kit | 1990-1993 Mazda Miata (10036-2100)1990 1993 Mazda Miata Stage 2 Steelback Brass Plus Clutch Kit by Competition Clutch This assembly provides up to 80% increase in torque capacity and is properly suited for aggressive street use and moderate track use. The Brass Plus material with its alloy backing matched to a performance pressure plate will provide smooth engagement and extended life. 500 mile break in highly recommended with this set up. 300 mile break in REQUIRED with this set up.