These came off 454 cu.in. Crusader marine engine that never saw salt water.   The boat saw very little use.  The pictures aren't that good but there is very little scaling in them.  Just some surface rust.  They appear to be in excellant condition (like almost new, in fact mine looked worse after one season).   They will last many more years.  I've thought of keeping them but mine are in the same shape and so I have no need.

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