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Windycity · 09-13-2015, 03:32 PM

I understand upgrading to dot 4 for better performance but how does air get into the brake lines? Im thinking the brake system is a high pressure sealed system and once the air is out that is it? I have never tracked my car so I have no experience there but i am curious how air gets in there?

09-13-2015, 03:32 PM	#3
Windycity Drives: Yellow 1le Join Date: Jun 2015 Location: Chicago Posts: 223 View My Garage	I understand upgrading to dot 4 for better performance but how does air get into the brake lines? Im thinking the brake system is a high pressure sealed system and once the air is out that is it? I have never tracked my car so I have no experience there but i am curious how air gets in there?