Helped with 450 walbro setup for my Acura integra DA.
ATL CFD-504 2 Wire Plastic Fuel System Bulkhead Fitting
This is the bulkhead fitting that you need for wiring your fuel system. These electrical bulkhead fittings feature a 2-wire standard "wire-through" design. This electrical bulkhead fitting allows you to run your fuel pump wiring through your firewall, fuel top hat, fuel sending unit, etc.
This is the Plastic version of this fitting and comes with a ptfe sealer washer. This works great with the walbro 450 e85 fuel pumps along with other fuel/pump combos where you do not want any wiring exposed in the tank. This is compatible with most racing fuels including M1 M5 and all versions of e85.
Excepts 12 and 14 gauge wire.
How does it seal the wires?
Wire seal operation is very simple. Unscrew the top nut. slide wires through the wire openings. as you screw the nut back down it squeezes the insulation material around the wires effectively creating a tight leak free seal.