These are an expanded version of the popular BMW/Universal Hood louvers.  The width is the same 23″ as before, but we have added two more rows of louvers, so each section has 5 louver blades instead of 3 and now measures 11.3″ high instead of the 7.5″ high of the original BMW/Universal Hood Louvers.  These louvers are cut from .080″ aluminum and ship flat so that you can use them as a template to trace the openings onto your hood before you form them to shape for use.