Buick LaCrosse MK2 (2010 - 2016) Rear Trailing Arm Bush - PFR80-1517BLK PFR80-1517 Rear Trailing Arm Bush rectifies the commonly failed rear trailing arm bush due to twisting. Flexibility and articulation is also maintained through suspension travel from the use of our dual part design. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!