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, mig 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.