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Old 08-18-2013, 02:19 PM   #11
Synner


 
Drives: cars
Join Date: May 2011
Location: Oversneeze
Posts: 4,544
They were some of the idiotic methods GM attempted to deal with squealing complaints. None are necessary but neither will they hurt anything if you get a set that has them. Calipers do not get balanced, they don't spin.
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