hooker performance exhaust products are covered under the standard holley performance 1 ... where a header for a pro stock race car will have larger primary tubes and ... better when it comes to street driven cars when you put too large of a header or ... inside and out it is corrosion and heat resistant up to 1600°f it also reduces ... ceramic coated headers require several heat cycles to fully cure before they will ... withstand extreme heat hooker recommends using cast iron ...