CNC machined CSI Pro Aluminum Spring Cups clip onto the lower spring so they can't come off during competition. CSI designed these spring cups to provide a lower center of gravity in relation to the shock eye. Another design benefit is the cup base, CSI spring cups have a larger O.D. base to insure proper spring performance. CSI... World Class Innovation and Design.QTY (2) Parts Compatibilty : MBX7 - MBX6R - MBX6 ECO - MBX6-T
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