If you've replaced your muffler, is the stock muffler a perforated core or a louvered core?
2012 F-150 XLT SC Ecoboost Tuxedo Black, 6.5' bed, 4x4, 3.55s, SSI tunes, 4" Flo-Pro exhaust with Twister resonator
I can do all things through Christ who strengthens me. Phillipians 4:13
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