To be honest, they look cool and probably add a great deep sound, but I've yet to see anyone identify if there is any real RWHP gain from this install. So far, all I've read is that it moves the power up (possibly) in the power band which means you lose low end torque-which is what you want when racing, not high end unless you plan to run at high speeds.....Anyone have some realy before and after Dyno numbers to show?
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