The Eibach ERS silver coilover spring with a 3.75 in inner diameter is designed for coilover suspension applications where inner sizing and predictable spring response are important. It provides a defined spring element for rebuilds or custom suspension projects and is intended to mate with standard coilover hardware. Use it when accurate fit and repeatable spring behavior are required for reliable installation.
Eibach Silver Coilover Spring - 3.75in I.D.