Competition Clutch 04-20 Subaru WRX STi 2.5L Turbo 6 Speed Stage 2 - Steelback Brass Plus Clutch KitThe Competition Clutch Stage 2 Street Series 2100 Clutch Kits provide 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. The 2100 Series kits include a Competition Clutch performance pressure plate, a high torque sprung disc with anti burst steel backed