tti exhaust muffler selection

I like them quieter when just cruising. They do open up when the revs are up too. Suits my expectations for this car's intended purpose.
Here's a sound clip with the TTI step headers I originally had on the car. I've gone up to the bigger tube W2 headers since this was recorded.
[ame]https://youtu.be/BR4Nrjbj-4Q[/ame]