To work on the RC8B3 and RC8B3e Big Bore 1:8 shocks, these springs require the #81221 Spring Collars and #81194 Spring Cups. (These spring collars and cups are included with the RC8B3.1 and B3.1e kits.)

This part fits the following vehicles:
RC8B3.1
RC8B3.1e
RC8B3.2
RC8B3.2e
RC8T3.1
RC8T3.1e
RC8T3.2
RC8T3.2e