Alfa Romeo Bulletin Board & Forums - View Single Post - For Sale ULTRA-RARE Set of 7J (!) x 14" Maifrini Mille Miglia's mag/alu alloy
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post #16 of (permalink) Old 05-13-2019, 07:42 AM
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Join Date: May 2003
Posts: 1,969
Originally Posted by PocketAce View Post
I have a 14x5.75 set, they fizzle nicely under vinegar. Definitely a mag+alu alloy.
a pretty darn easy way to guesstimate the amount of mg in the wheel is how dark untreated areas get. if its has high mg content it becomes dark grey from exposure like the sexy gta/gtam autodelta mg valve covers and bellhousing.

you can see how dark they get...
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