i have a 9g with only front springs installed from eibach and its seems fine. warm sent me to this thread. if u are into racing do all 4 and keep some extra springs for inside ur truck so u can make sure ur spring rate is good enough. i know 240sx s with springs only on ONE SIDE like the driver side cuz the only drift one side. so do what u want and what looks good and dont care about the rest.
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