"High performance bearing"?? You might want to Google "frictionless bearings" or ball/roller bearings. As bluefront mentioned premature bearing failure is very often the result of incorrect assembly procedures, OR, the original parts such as the hub or axleshaft or steering knuckle (depending on the design) may be worn or damaged from a prior bearing failure. All the parts being dimensionally correct is absolutely critical because there are usually interference (tight) fits involved here. Also, having the tooling (a selection of pushers/mandrels and a press and the knowledge is essential. AND on the fronts.......torquing the damn axleshaft retaining nut to spec. is damn important as well. (not just impact gunned)