Dodge Charger, Challenger, 300, and Magnum Whiteline subframe (crossmember) bushings eliminate rear end squirm under acceleration and improved front to rear chassis control.1 set does the entire rear subframeWhiteline Synthetic Elastomer Bushings: After extensive development and testing of materials that would offer strength and durability, geometry retention and memory without the harshness, WHITELINE has created a progressive, long-chain Synthetic Elastomer that delivers the combined physical advantages of solid bushings, with the extreme flexibility characteristics of rubber.