Just wondering how it sounds. The muffler shop seemed to think I'd like it and it's cheaper than Flowmaster. Any opinions?

 

I'm using one of their regular Flo-pro mufflers behind my 4.6 and it sounds fairly good. It's just enough to tell it's there at idle, step on it and it sounds really good, once you settle into an RPM in OD it mellows out. The only reason I rate it at only fair is I wanted something a little louder. This was the only thing they had in the time that fit what I wanted to do. A buddy of mine used the same muffler in a little different setup behind is 5.4 and it sounds great, a little louder too.
Not sure on what the twister would sound like, never seen one before. I wonder if it would create the a similar sound of the Spintech mufflers. All I can say is try it, I wasn't too sure on mine but took a chance and it sounds OK.

 

Here's a link for anyone who's not sure what I'm talking about. I've never seen a muffler like this before so I wouldn't really know what to expect....

Twister