BMW 3 Series E90, E91, E92 & E93 (2005-2013) Transfer Case Bush Insert (Standard) - PFF5-4628 PFF5-4628 Transmission Case Bush Insert (Standard) is made from our Yellow 70A durometer material, providing an excellent balance of strength and compliance for improved performance on standard Petrol/Diesel vehicles whilst limiting NVH transmission into the cabin. An increase in NVH, usually at idle, should be expected when stiffening the mount between the transmission and chassis. The harder the material, the greater the NVH transmitted. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!