Louvered hoods are part of Hot Rod history. They have been around just as long and go hand in hand. I have heard my pops talking how they would go down to the local High School and steel the locker doors, cut em up and weld the louvers where needed or wanted. This is no longer nessesary or legal! I personally love louvers I have had them on most of my hoods, fenders, decklids, glove box doors or where ever I could fit them! I recently took some pictures of Sir Michaels in Huntington Beach, Ca louvering the hood on my 2002 chevy (same proccess on an old car). blank canvas remove the part to be louvered all surfaces must be stripped of all paint or finish any cross braces or supports must be removed louvers come in all shapes and sizes. I prefere the traditional 4" each louver is carefully laid out. Measure twice cut once each louver is punched one louver at a time, the old fashioned way.(with the exeption of a hydrolic press) final product, less re-assembly of inner structure, minor prep work and paint final product! not only does it look kool it ran 10-15 degrees cooler!