I still don't know what the hell you guys are talking about.

Both my Accord and TSX, have a ~"2 lets say filler neck pipe, the pipe then has a funnel type plate welded to the inner dia meter to hold the petrol filler tube.

And it's sized so that you can't fit a diesel filler tube.

Bottom line no moving parts, no flaps...what the hell could you brake off and loose in the tank. And your gas door locks, who the hell would syphin your gas without breaking into the car to unlock the door?

I have no clue what is going on in this thread......