BMW 3 Series E46 (1999 - 2006) Rear Subframe Rear Bush Insert - PFR5-4613H The inserts are an intermediate solution designed to restrict movement in the original rubber bushes by filling the voids. These are only recommended if you want to stiffen the standard bushes slightly and the original bushes are in good condition. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!