Blitz bov prob

Hi just fitted a blitz bov bought of ebay came of a 95 scooby wrx as my old dump valve was too small and just made the flutter sond from the turbo which i think causes lag anyway its still making the flutter sound and not the dump valve sound now Its fitted so basicaly is it not working?
 
The bit at the top of the dump valve the only place it can go on. Ye its got the nut ontop with the thread threw it whih u can lengthen and shorten but ive tried both and hasnt made a diff
 
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