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The Eibach ERS silver coilover spring with a 3.75 in inner diameter is made for coilover suspension work and chassis tuning where inner-diameter compatibility matters. It provides a repeatable spring element for rebuilds or custom setups and is sized to mate with coilover components. Opt for this spring when you need a defined, reliable spring choice to support predictable suspension response.
Eibach Silver Coilover Spring - 3.75in I.D.
