Dynomax makes the only “True” turbo as far as I know. Also they’re the highest flowing turbo muffler I can think of at the moment.
Moving away from a turbo muffler, my favorite is the chambered muffler. I like the sound of the Hooker Aero Chamber muffler. The center in and out I like the best.
You might want to tune into an episode of Engine Masters for the cheap muffler test. They run through turbo, chambered and straight through mufflers to compare on a dyno to see what they produce. It’s a pretty good episode.
