What is the difference between a Walker Quiet Flow, Sound FX 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.