Ancient hand-built individual port Nitrous setup of unknown origins or experimental prototype. The individual port Gas and Nitrous injector nozzles look to be "fan-spray" type. All of the injector nozzles look like they accept a NOS brand tuning jet. It's distribution block is made of aluminum. It shows it's age with scuffs, scratches, patina, etc, etc. $620 cash, pickup in Kennedale or Arlington Tx.