This seems totally backwards. The reviews I've read have had nothing but praise for these pipes.
No they haven't all been positive, I;m looking at a poor one and a mediocre one right now.
Why the obsession with a cheap pipe from China anyway ? It 's CHEAP,and it looks like it.
If you stick around in the sport long enough, at least long enough to have a bike that you might want to buy an aftermrket pipe for, you'll see that there are very,very rarely any products that don't fall in the "you get what you pay for" caregory.
The Akrapovics,MRD's,FMF's, White Brothers,Two Brothers, Pro Circuits, Yoshimuras etc.,etc. all cost a lot more than that pipe does, and if you pick one of these up and look at it compared to the Jardine you'll see why.
If you want one, by all means go get a bike they make a pipe for and let us know how you like it. Doug