The oone on t5uk, takes away the power of your ecu , so if you over boost it would not knock the stock boost back down to prevent knocking.Y ou might end up blowing your motor this way. I installed mines this way locate the wastegate and the line that comes of the wastegate nipple(vacuum) it goes to a tree near the airbox. Take of that hose install it to the side with the little breather hole on the boost controller and the other end goes back to the the line headind to that tree I spoke about before. Just basically take the hose they give you (grey) install it on the waste gate nipple and the hose that you took of goes to the other sdide of the wastegate. Hopes this help and happy boosting by the way I like the way your car loos Godzilla.