replacing vacum lines !?

need4speed

On the never ending quest
So ive got an overboost problem usually at around 60 mph it falls flat on its face picks back up for another 10-15 mph an does it again. what should I look for ? Vacum lines ? if so what do i need to replace them any mods for them ie bigger hose ? and what else shold i look for ?

please post pics as im not sure of somethings you guys talk about as far as boost line conections thanks !
 
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