has anyone heard of them or know where they can be bought from

 

no, and i would stick to a good known name. FMF, Pro Curcit, Yoshi.ect.

 

New exhaust companies spring up all the time. I can think of jardine and a few others that tried atv exhaust and fell flat on thier face. Stick to a good known name unless you have some proof as to the performance of the other pipe.