The Eibach ERS 6th coil spring is a specific coil element for ERS-style coil-over assemblies. It provides the appropriate coil section where that sixth spring segment is specified and should be matched by length and inner diameter to existing ERS components. Verify dimensions and perch compatibility when replacing or rebuilding a multi-coil assembly to ensure correct seating and intended spring behavior.
Eibach ERS 6th Coil Spring