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BMW 3-Series (E90 E92) Forum
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Sonic Tuning S1 Coilovers review
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01-21-2011, 07:44 PM | #67 |
Brigadier General
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Is the Sonic a coil on shock absorber or a coil on control arm system? Is one a better design than the other or is it more of a function of what spring to go with?
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