WTB: Firewall Plastic Clamshell Wiring Harness Passthrough (Page 1/1) reinhart JUN 03, 10:40 AM Anyone got a plastic connector Clamshell Firewall wiring passthrough (or two) with the retaining U-clip? It's the ones that are glued around the wiring harness from the cabin by the ECM to the engine compartment and wedge into the firewall. If you have two I'll like both or if just one let me know. I know I can easily find them the junkyard but think I'll have problems getting the glue undone without some sort of heat gun and no way to power it in the junkyard.