WHITELINE W63390 Upper Trailing Arm Bushing - FrontDescription WHITELINE W63390 Upper Trailing Arm Bushing Front Optimise rear suspension geometry with Whiteline suspension bushings. Often overlooked, Whiteline trailing arm bushings offer superior dynamic alignment precision by controlling excessive movement. This provides driver reassurance for more predictable handling. Optimises rear suspension geometry Controls excessive movement for improved alignment precision Enhances predictable handling Kit