Spirolocs function like circlip retaining rings, but are preferred by many racers for the extra level of security they provide. This Spiroloc retainer is designed for the 1/2" bore x 1" OD spherical bearing used on many racing dampers, including Penske 8100 and Bilstein large body coil-overs. Requires no modification to the circlip groove. Sold individually.
If your shocks use either the Penske Standard Spherical Bearing (Part No. 8011-02) or the PTFE-Lined Spherical Bearing (Part No. 3071-8), you can use these Spirolocs in place of the C-clips.