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EFR turbo boost solenoid question

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the factory fitted boost solenoids that come on the efr turbos - are they just a bleed valve or a proper interrupt style 3 port solenoid (mac valve styles)?

 

the turbo booklet referred to them as bleeding some boost away.....

 

efr-labels.jpg

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Theta re are 3 port change over valve similar to mac 3 port 

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1 hour ago, gotasuby said:

Theta re are 3 port change over valve similar to mac 3 port 

No benefit to using a Mac valve over the stock efr valve? I'm going for one of them turbosmart ewg's

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