Stuff like this is way too familiar in car communities. There was a guy years back who started offering turbo rebuild and turbo conversions for dirt cheap prices. He even started dogging one of the major community vendors who makes turbos that had proven to make huge numbers and said he charged too much and his turbos would make more power.

Long short, no ones turbos lasted and even though he had warranties he didn't make right on them and ended up bailing owing people well over $30k.