Over time, the factory coil spring insulators can wear out, and signs such as increased noise, a bumpy ride, and visible damage may indicate that the insulators need to be replaced. Our coil spring insulators kit includes a high-quality insulator and bearing, designed to protect your spring and spring seat from damage while also helping to reduce noise during operation. Ideal for a quiet and smooth ride, replacement with this component ensures enhanced durability and performance. name:Coil Spring Isolators Part Number:Upper Coil Spring Isolators Replace:142160040, 274-9704, 2749704, 45G18704, 577-1704, 5849704, CSI192, CSK7, DG5771704, FM1631, K160040, MS25211, TD4645W. Lower Coil Spring Isolators Replace:52088401,K160041,SSA/WJ/013A,SSA/WJ/014A. Fitment: for Jeep Grand Cherokee WJ/WG 1999-2004 Colour:Black Material:Rubber Package Contents: 2 x Front Upper Coil Spring Isolators 2 x Front Lower Coil Spring Isolators