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      01-15-2019, 02:01 PM   #43
jeff@autocouture
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Drives: 2002 E53 X5 4.6is
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Quote:
Originally Posted by KevM3UK View Post
so what is WPC coating on oem bearings? im thinking of going oem with ARP bolts
It's a micro shot peening process to increase strength and decrease friction on a surface.
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