Rockauto flywheel feedback

RockAuto does not make parts, they are a reseller. They deal in manufacturer overstocks, dealer liquidations, closeouts, etc. for the most part.
Take your flywheel, for example. They probably list several different ones, all different manufacturers. You'd have to look up the manufacturer of the one you're looking at to find out the country of origin (yes, most all are made in China now, regardless of brand). Most of their parts are the same ones you get at O'Reilley's, Autozone, NAPA, Advance Auto, CarQuest, etc. Quality varies between brands, as always.