ACT Modified Sprung Street Disc | Mazda 3 (2005) (2000207)Modified Sprung Street Disc by ACT 2000207 is a modified spring centered street disc featuring premium organic friction material 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 heavy duty torsional dampening springs are stronger, in most cases, than standard springs and are