yer i have some "gineric" bridgestone coilovers in my car (s13 front end)

and turns out that they have used KYB agx inserts.

smaller companies tend to steal stuff from other companies, and just slap their name on the outside.

so maybe they have decent inserts, maybe they dont. you would have to dig some more.

best bet would be to ring up a suspension shop, and ask about them. even ring up a shock absorber repair/rebuild place. if you cant get them serviced when they blow a seal, then id stear clear.