Nissan fire wall gourmet. This grommet allows the wiring harness to pass through the firewall. If your old one is cracked or missing, this replacement protects your wires from damage and electrical issues. It can also be used as a universal firewall grommet for custom wiring. Without it, wires may rub on sharp firewall edges, risking damage and potential fires.
 
Perfect for any engine swap when re routing cable.