I had a set of those bleeders on my Vette and they worked great. I have a master bleeder that I’ve used on most everything else for FLUSHING. Bleeding a system that has been opened up in multiple places is a different kettle of fish and often requires two people or one of the professional bleeders.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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