Having been an Import guy for the last 5 years I can tell you that OBX and other cheap Chinese brands can only take you so far. Buy simple stuff from them like radiator hoses, knobs, and even catbacks but don't put your faith in stuff that is meant to be abused like headers, turbo manifolds or even turbochargers! They usually end up failing at the welds in a hurry if you can somehow manage to get past their everpresent fitment issues.
That said some of these brands (Megan Racing springs to mind) have done miraculous turnarounds and offer decent to great products (once again only for things that don't get beat up too badly or endure constant wear).