Quote:
Originally Posted by givengold
Sanderson, and wrapping them traps moisture from condensation when heating up and cooling down. The headers rust out much more quickly. You are just trapping the heat in them. Leave them unwrapped and let the heat and moisture dissipate.
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^ Winner, winner, chicken dinner!
Don't use the wrap unless you're forced to. It works great for the turbo guys, they need all the help they can get and ceramic coating generally isn't enough.
Save your nickels and dimes until you can afford good ceramics.