Really aluminum? I think it should be because I asked a friend studying degree for chemistry. What is AL. He said should be aluminum. The guy who sold me the exhaust also said this kind of extractor won't rust.AL is aluminum woh! or for exhaust some mixture becomes alloy......:hmmmm:
Here are some pic of how it is when stained and after I tried scraping it off.
Actually I just installed this today.
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