Who makes the SR5 struts/shocks?

I’ve done a lot of searching and found suggestions for replacing the OEM front struts and rear shocks on a PreRunner SR5 with Bilsteins, but haven’t been able to find who is the manufacturer of the OEM (black) struts on the PreRunner SR5’s. Does anyone know?

For some reason I’m assuming they’re KYB GR-2’s but that’s literally just a guess. I have nothing to base that on.

I know everyone on here says to replace factory struts/shocks with 4600 or 5100s, but I’m looking for an exact stock replacement and wondering if the KYBs are it.

 

thought I saw Hitachi on the 4600's

 

Yeah pretty sure hitachis. If you need to be sure I can go look, they're in my shed

 

Its these.

 

Thanks y’all!