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What is the difference between a Walker Quiet Flow (21276), Sound FX (18444) and Pro Fit muffler?
A Walker Quiet Flow muffler is a 3 tubed design, premium muffler that is designed for O.E. equivalent sound and precision fit.
A Sound FX muffler is a 2 tube design muffler, with direct fit designs that are O.E. equivalent.
A Pro Fit muffler is a high quality universal fit muffler for installer shops and fabrication uses.
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