BMW 1 Series F52 Sedan (2017 -) Upper Engine Mount Insert Kit - PFF5-1321 PFF5-1321 Upper Engine Mount Insert are a simple, but effective rod design made from our Yellow 70A material. They fill the key voided areas of the mount to restrict engine roll, providing the perfect balance of compliance and rigidity, making them ideally suited for your daily driven vehicle. As the vehicles age and simple upgrades seeing the 2-ltr turbo engine push power north of 250bhp, the OE rubber engine and transmission mounts are showing their age, with cracked rubber and excessive movement. Designed to fit within the voiding of the original mount, these new inserts prolong the life of the OE mount by stiffening and limiting movement of the rubber. This results in a more settled transmission response during acceleration and deceleration, improving gear changes and reducing wheel-hop. The effective rod design made from our Yellow 70A material. They fill the key voided areas of the mount to restrict engine roll, providing the perfect balance of compliance and rigidity, making them ideally suited for your daily driven vehicle. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!