These RCAs (Roll Center Adjusters, or Bump Steer Spacers as the 510 guys call 'em) are designed to get rid of that pesky bump steer on your lowered vehicle
The alignment sleeves are solid milled into the unit, so they will not get lost or come off. We also added a larger alignment ring for the center of the unit, to provide even more shear protection than other RCAs on the market. These RCAs will NOT move or become mis-aligned, no matter how hard you drive.
Comes with all mounting hardware - four new grade 8 bolts and lock washers.