Вопрос по глушителям Walker

[Manfred]

Вот что нашел на официальном сайте:
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.