How much header wrap for my header???

About how much header wrap should i need to do a aftermarket D series header? What lenth roll will do the top of my header? Will 25’ be enough? I want to wrap it in black to make it look a little better and keep the heat down. Who sells the cheapest wrap. What are the best straps to get to hold it on?

Header wrap = bad for headers.

Its a cheap header with a little rust on it, just want to make it look better dont really care if its bad or not.

25’ Should do it with a little left over.

why is it bad for headers?

IIRC, it holds the heat in against the header and causes them to crack

^and rust way quicker.

It will make them rust a whole lot faster.

advance auto sells it i think its under 60 bucks for a whole shit load of it

Not to go too far off topic, but how much does the typical ceramic coatings go for?