None at all mate I know another guy with a quadlight who didnt need to either, I would drill the holes out that connect to the turbo (on the hot pipe) as it was a tight fit and I fucked my threads up so had to put a new bolt in. My actuator is wound right down now as boost creep is insane, it feels really laggy now and feels like theres a monster of a turbo on there but when it comes in, it comes in, the top end power increase is mental!! Hopefully my AVCR will be here soon so it will be boost boost boost and not much lag ;)