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This Eibach helper spring features a 2.25" (57.15mm) diameter, and an overall length of 3" (76.2mm).
Helper springs are used to keep the main spring tight between the perches when the suspension is at full droop. A helper spring has a very soft rate, about 10 lbs/in., only giving enough force to push the main springs up against the upper spring perch. A helper spring guide is necessary to center the helper spring against the main spring.
Sold individually.
We also recommend ordering a coupling/spacer for each helper spring. Please see below for BimmerWorld recommended related items.
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$50.00
Eibach 2.25 Inch Helper Spring for Coilover Suspension
Keep your race springs settled in place while in droop.
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