BMW 3 Series G20, G21, G28, G80 (2018 on) Front Radius Arm Bush - PFF5-2501 PFF5-2501 Front Radius Arm Bush is made using our Black 95A durometer material and supplied with outer shells to increase stiffness by up to 300%, controlling longitudinal wheel movement under braking, cornering and improving longer-term durability. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!