The hole inthe bottom of the tip is for water to drain out of it, when moisture is present at startup. To thebest of my knowledge, there is no silencer.
i learned the hard way many years ago about that hole in the bottom. I got an aftermarket exhaust for my vw, and it had no hole. In 3 years, there was one. The whole tip was rusting from the bottom out. But it was really cheap.
With just the axleback it isn't bad at all, but it with a header is pretty bad. Now I have a full catback, the header, and a midpipe with high flow cat and it is still a lot quieter.
