Jet Hot Headers by Kooks are made from 409 stainless and then Jet Hot coated. Jet Hot high temp coatings reduces underhood temps by 56%, stop corrosion, increase performance through better scavenging. These are ready to ship with the silver polish coating already applied, no more waiting. The coating protects from erosion for 1000+ hours, distributes heat evenly, keeps engine temperatures considerably cooler, has a lower price point and a lifetime warranty against ANYTHING including rust. Call Beefcake Racing 1-855-827-7223 from 9am-10pm EST.