These are z31 harness bars(OG JitterGlitter Factory style), they allow you to run harnesses in your car without having to do a roll cage and roll bar. These are made from 1.5x.120 wall dom, 1/8" steel plate for the ends, fully tig welded and bolt directly to the factory seatbelt bolt holes(which means you wont be able to use the factory seatbelts anymore).
These come in a raw bare steel finish.