These lightweight Carbon Kevlar NACA ducts feature larger air inlet openings to direct a larger volume of air under the hood. They will in turn provide better cooling efficiency for the turbos and engine underneath the hood. These top quality NACA ducts, like all of our carbon kevlar products, are 100% hand-made with our high quality carbon kevlar and special UV resistant epoxy resin. It’s polished to a wonderful shine but has no clearcoat for maximum weight savings. You can’t get any lighter than carbon kevlar.