I have heard of such devices, some years back there was a recipe book for car engine cookery called Manifold Destiny. Here is a book of Model A cookery you can have for free. No doubt the recipes will work on other cars . https://static1.squarespace.com/sta...f3/1462417857543/Cooking+on+your+Manifold.pdf I'm sure I have seen articles on hot dog cookers and the like in old Popular Mechanics magazines . They were never common, but one of those things that kept being invented over and over.