Probably still more effective that the pipe through to the catcher one i saw a while back, but defiantly not built for rugged longevity.
I'm personally not a fan of the 90 degree bend, I know it's effects would not be that pronounced, but just not something i would be happy having that sharp.
Like the catcher muffler, this one is a home job I wont be buying, unlike my new friend wood-wheel!