(20 Spline, 212mm Diameter, sprung) Built for the Honda Civic... ACT 6-pad Performance Discs are available in sprung and un-spring/solid hub designs that are highly durable and resistant to heat. These 6-Puck/pad discs are recommended for larger clutch sizes to absorb more heat and for smoother engagement. Features:Chrome-moly hub is heat treated for strength and durabilityHigh quality ceramic friction material which produces 28% more friction and torque capacityHeat treated spring steel drive plateLight weight rigid design for quicker shifts and smooth, trouble free service