Most items from factors "are" copies,TRD you will probably find is owned by TMC.
Toyota would not allow any old company to use brand name ie "Toyota" Racing Development
A lot of factor parts are ******* quality,you get what you pay for "most" of the time
Yes some items are made for Toyota for their vehicles most commonly exhaust & friction parts (pads,clutches etc)
But then again you dont really know which they are especially when there are lots of friction material manufaturers