Fellas, you're all getting off track a bit, the OP wanted to know which exhausts made the most power and produced the best sound, now power wise, due to the370z.com members independent dyno sheets, the Stillen and FI exhausts produce the most power, its been proven. No one said anything about weight, now sound is subjective, but lets stay on topic please and not turn this into a pissing match about whose exhaust is better mmkay? Now when other members post dyno sheets with their HKS/Greddy/Berk/Invidia, etc. exhausts that make more power than the Stillen/FI exhausts, then the debate will be settled, but until then, fact is, Stillen/FI make the most power.
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2011 Mustang 5.0 | 3.55's | Lethal Performance off road H-Pipe | Magnaflow Muffler Delete | JLT CAI/Bama tuned 417whp/ 404 ft/lbs
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