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The Eibach ERS coilover spring, 3.75-inch inner diameter, belongs to Eibach's Race Spring System and is manufactured for consistent, linear spring rates with very low tolerances. Produced in series production, ERS springs offer repeatable characteristics and quality control suited to coilover assemblies. Match the spring I.D. to your shock and perch for correct installation.
Eibach Silver Coilover Spring - 3.75in I.D.
