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as far as break in time, usually 4-6 weeks for full resonance, right? but i have read torching that motherf*cker with a propane torch can break her in faster. just put it through its break in heat cycles faster, ya know? i already notice a dramatic change just in 2 days with sound.... a lot smoother and deeper, less raspy (sounds like i just described a good BJ right there). any truth to this muffler myth u guys?
My Flowmaster has been on for 3months the tone is still changing, getting louder and deeper. Torching it would have a negetive effect on corrosion resistance.