I don't think there have been any before and after dynos for the ark, so unfortunately it's an unknown. I like my ark, but I like everyone else in this thread, am biased. Your best bet is to hear both locally and decide.
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2012 Mercedes C63 AMG P31 Sedan, ROW, aFe, Eurocharged Dyno Tune. 438WHP/415WTQ
2010 SOLD: 40th Anniversary 370z
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