you need to put it in the cooler lines. either between the turbo and the cooler, or the cooler and the throttlebody.
there will be a hose on the other end, or a nipple for a hose to go onto. this hose needs to go onto the plenum chamber, so that it has vacum when the throttle is closed. this is what actuates the valve and makes the fully sic dorifto ptttttsssssscccchhhhh noise
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