These universal Inner Flapped Louvers can be utilized to vent heat and high pressure under hoods and fenders. The total dimension, with mounting flange, is 22" long x 6 1/4" wide. The Louvers are 4 3/4" wide and 1 3/4" tall. They are 100% carbon fiber and are sold in pairs. The final mounting solution is up to the end-installer, but is usually rivited. Made from 100% carbon fiber and coated with a lightweight gloss coating, which offers UV protection from yellowing and hazing.