3000816 is a street rigid disc featuring premium organic materials with high copper content for better heat transfer and steel - backed lining for greater burst strength and durability. These discs are modified with reduced marcel for faster shift action to complement ACT pressure plates. The chrome - moly hub is heat - treated for strength and durability. Rivet design and materials are carefully selected for maximum strength. Lightweight, solid - hub design allows for quicker shifting and engagement. ACT's street rigid - hub discs provide race - proven performance with street manageability.