I like the pipe and several other members have used the same one including me.
It's a great improvement over the stock set-up as it is.....but...
A couple of things that I noticed about mine:
1) inside the cones where they met the straight pipes the welds penetrated so far in that they almost block exhaust flow.
2) the straight pipes went about 1 1/2" to 2" inside the divergent and convergent ends. That keeps the sound waves from "bouncing" off of the cones efficiently. I cut mine out.
3) the total length of the chamber part is really short.
I added a 3" piece between the cones for added midrange.
4) I burned my leg on that sucker. Wrap it with some perforated metal so there's a little air gap between the pipe and the perf. metal.
It only takes a second for that thing to touch your leg and ruin your week.
I like the muffler set you have and it looks nicely done.
I think I still have a picture of mine...
I've since changed it out with a different one..