Mazda Mazda 3 Mazda 3 BL (2009-2013) Rear Trailing Arm Blade Bush - PFR19-812 PFR19-812 provides stability to the rear trailing arm whilst allowing the knurled pattern bush to freely rotate in the supplied outer shell. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!