This is a four pack of optional Yokomo Aluminum Short Spring Cups. These cups are for use with the Yokomo SLF Short Shock II only.
These exclusive spring cups are designed for the short spring to be used. Although the standard spring cup of the BD8 is shaped to be compatible with long springs, it is easier to apply spring tension when using a short spring and short cups, and it is possible to keep the spring itself in the proper position. | 
