How to identify OEM bumper
 

I am in the midst of picking up a spare rear bumper in the event of off road excursions during track. Is there a way to verify that the bumper is OE? Does anyone know if there are OE markings on the inside?

Thanks.

Like most other body parts there’s Subaru stamps on them

like how OE? the oe parts made by 3rd party factory in US has a sticker instead of subaru stamp

They are what most bodyshop uses. They are usually not 100% alligned like real oe parts from japan, but it's hard to tell unless you know what you are looking at or has the parts next to each other with a ruler on your hand.

*my trunk isn't oe from japan & the angle of how it tapers off towards the rear is slightly different, I couldn't tell the difference till I install it & notice my wing angle is different...