The Eibach ERS coilover spring is a silver coil spring sized for coilover assemblies with a 3.75 in inner diameter. It serves to provide predictable spring support and helps tune ride height and handling in adjustable suspension setups. Offered as a single spring, it fits into coilover systems where consistent, repeatable spring behavior is needed for setup and cornering control.
Eibach Silver Coilover Spring - 3.75in I.D.