Does anyone have positive or negative opinions/experiences with aluminum or polyurethane subframe and differential bushings? I'm comparing SPL's aluminum subframe bushings combined with Nismo's differential bushings or just going all Energy suspension. I know the aluminum produces more noise but besides that what are the significant differences in performance and longetivity?
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Aluminum vs. Polyurethane - MyDreamZ23:01:15 05/06/09