Turbo Pro Muffler - Optimal Flow, No Drone, No Resonance

harrisonm said
@ColdCaseJoe: I have a 69 Barracuda with a 340 that is modified to about 370 HP. It has 15 year old Turbo Mufflers (Dynomax I think) that I got from Advance Auto for $20 Each. The car sounds Awesome with these mufflers. Fairly loud, but not too bad, and the idle rumble is great. They are starting to rust out, and I am really concerned that I might get new mufflers that would quiet it down too much and destroy the sounds I like so much. On the other hand, I don't want it obnoxiously loud. Which of the mufflers in post #1 would you recommend?

If your turbo pro's are 15 years old and rusting, it's very likely they could be leaking and I would bet the sound deadening material has all but disintegrated. So our version of the TP is probably going to be quieter. The TP is our 'QUIET' muffler. If you want something with a little more sound, go with the Street Pro. Just remember that you will experience a little bit of drone at around 1800 to 2000 rpms cruising speed. You can't have everything! lol! you have to pick what is most important. :)