My friend and I both installed them (his is a two-barrel, mine is a one) and about an hour on the highway his trottle was stuck. So we pulled over and noticed his spacer melting, keeping his carb butterflies wide open! We both took them off and that's what mine looked like. His was similar. No choke things open or anything.

I will admit the engine bay in an A100 gets really hot, but neither of us was overheating...just regular heat as expected. Nothing else has ever melted in there....never melted any wires or hoses or anything. The cool carb thing is junk.