On the Heat Extractor hoods. They are great hood and very cool, but do not get them if you want to keep it clean under the hood if you car sits outside alot. I had a 94 Saleen that was my wifes daily driver, it was impossible to keep the engine bay clean, water will run down into the engine, if it sits under a tree, leaves will fall into the openings. Just wanted to inform anyone that was thinking about the extractor hoods as far if it is better suited for the conditions of your car and your use of it.