The brand-new suspension arm design in the TRF420 chassis use aluminum bushing inserts to allow quick, minute adjustment of damper attachment position and leverage ratio (i.e. the angle of the shock damper). This part is the B bushings, which can be used as a Hop-Up Option. Attachment only requires removal of the ball connector and grub screw, saving valuable time during set up changes. - TRF420 Suspension Arm Bushings B x2 - Blue anodized finish.
