Hm, this worries me. I have an HKS Hi-Power installed just by itself at the moment, but I have some HFC's that are going to be put in soon. Was the tone too quiet or not deep enough or something? I personally think the HKS is a tad too quiet by itself, but I was hoping HFC's was gonna be perfect. If not, Test Pipes are the next option.
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2012 Pearl White 370Z GReddy Twin Turbo
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