Whiteline Control Arm Lower Inner Bushing | 2004-2011 Mazda RX-8 Base (W63387)Whiteline Control Arm Lower Inner Bushing 20042011 Mazda RX 8 Base Part #: W63387 Overview The Whiteline Control Arm Lower Inner Bushing is a high quality replacement component designed specifically for the Mazda RX 8 from 2004 to 2011. If you're experiencing uneven tire wear, unbalanced braking, or a less predictable rear end during cornering, worn or damaged control arm bushings could be the culprit. Upgrading to Whiteline's synthetic elastomer