My TTI 3" system on my BB400 Dart Sport is cool. I bolted it all up myself. Fit needed some tweaking here and there and it still has some rattle issues that I need to sort out. Muffler guy with a big pry bar? All of the sound is out the back of the car but it's still a little loud for my taste. This has the quietest (I'm told by TTI) dynomax mufflers they sell. It is coming out of huge by extra large TTI headers. This is weak, little, high gear burnout when I first got it running. It gives you an idea of the sound. TTI 3" SOUND