Has anybody used these? I keep seeing them and wondering if I could get away with them instead of mufflers. The advertisements say the 3 disk is good for street/strip cars, but I don't beleive everything I read. My exhaust being re-done with the next engine change to dual 3"/no cat so if I can use these it will save alot of headaches.

I don't have to worry about emmissons or visual inspections at all. I just don't need to make the neighbors mad, I have one that will do that already.