custom exhuast
 

Im making an exhaust for my turbo build and wanted to put the muffler all the way at the end and cut the flanges off of it and i can't seem to find anything similar to what I'm thinking of. are there any serious drawbacks to something like this?
sortof like this picture i threw together but without the flanges sticking out.
https://cimg3.ibsrv.net/gimg/www.mia...682d2b3020.png