Polybush | Rear Upper Control Arm Inner Bush | Toyota GR Yaris | G16E-GTS | 2021+POLYBUSH Polyurethane Bush Kit; proven on the race track as well as the road, these bush kit sets from Polybush allow you to replace standard rubber bushings with high performance polyurethane versions. All vehicle's front wheel, rear wheel or four wheel drive will achieve a higher level of performance. POLYBUSH components will not break down or deteriorate from exposure to oils, under car chemicals, or under atmospheric conditions. This kit was