Hardrace S2000 rear roll center adjusters (RCA) are extended ball joints that are designed to directly replace the factory ball joint inside the rear s2000 knuckles.
When a vehicle is lowered, the geometry of the front suspension becomes altered. The lower the vehicle is, the greater the angles are increased. This change drastically affects camber and caster, steering response, stability, handling and cornering performance.
Hardrace RCA's with their increased length, are able to reposition and correct the angles of the S2000 rear knuckles and lower control arms. The resulting correction in the suspension’s geometry will improve response and handling, decrease roll, and increase tire contact patch and tread life, while making alignments more consistent.
For a lowered S2000 chassis, this is only part of the equation. Front RCAs are highly suggested to be used in conjunction with these rear RCA's as well as a front + rear camber kit, anti-bump steer kit, and rear driveshaft spacers.