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Hello guys is there a blow off for the duramax turbo? coz i really wana listen to that Tessss!! sound when it shifts :) ??
 

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You don't need it since the turbo is Variable Vane on yours and you don't have a throttle body. That is the reason gassers have to have one. I have heard guys installing them though, not because of shifting, but so it keep the pressure at a safe level.
 
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