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What's under here?

1K views 4 replies 3 participants last post by  SRM Autosports 
#1 ·
Whilst searching about on line for my R8, I've noticed that a few of them look almost rusty on these engine bay side grills. What is under there and what causes them to discolour in this way?
Thanks. Lee
 

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#3 ·
Rain water drains through the vents onto them so they can suffer from staining if not given a bit of tlc now and then.
 
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