Originally Posted by cmyk
Allstate told me something similar (though didn't quote a specific dollar amount). My adjuster told me that any aftermarket parts on my car would be factored into my claim if they were damaged; I'd just need to provide receipts for them during the claim process if needed. I assumed he was referring to things like wheels or appearance mods (like blacklines for example), rather than performance parts, though he didn't specify.
Allstate told me the same thing. Anything I can provide receipts/proof of purchase for (parts and install) would be covered.