I want to lower mine too. the wheelgap bothers me now and then. sigh... the scraping at stock height sucks. I have found out that a can of clearcoat and a fine sand paper became essential.
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2010-PW-370z Fast Intentions CBE 18" res + HFC, K&N Typhoons Intakes(Gen 3 Stillen soon), 20mm H&R Front - 25mm H&R Back, Shine Auto(Sunline)