The IP panel works great for the inner panels of trucks and cars. Get the most authentic replication of your vehicles from the 1940s-’50s. Check out the Gallery for examples of this panel. Please note, that some vehicles like the Studebaker used the 3S to create the inner panels. Be sure to check the measurements on the product photo against your model car body part to ensure proper fit. The IP panel has one pair of louvers, 9 on each side for a total of 18 louvers.