Right off the Bassett website:
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Q: My Headers Are Rusted In Between The Pipes And On The Back Side
A: The headers are steel and they will rust if you do not put oil on the headers while in storage. Some of the conditions that contribute to rust and corrosion are humidity, condensation, seats will wet, water in bilge, water left in water injection lines, and water left in top of t-valve. In addition, if the battery is leaking, the acid vapors will rust the headers. Thus, it is very important that you put a good oil such as WD-40 or LP-1 all over the headers, in the collector, and in the weep holes. Remember to wipe all of the oil off with windex and paper towels before starting the motor or you will yellow the headers.
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