You've seen them all over. On vintage race cars, trophy trucks, motorcycles, and even—for some reason—street cars. They're header wraps, and manufacturers claim they not only reduce radiant heat, but create additional power through their scavenging effects and superior heat management. Is any of it true?? We'll find out on this episode of Engine Masters, presented by AMSOIL, as we test a set of painted, ceramic-coated, and wrapped headers against one another on our Ultimate Average 383.