New updates. We fitted the upgrade parts. First we fitted the 375cc injectors, relocated the steering wheel bottle, installed the water/methanol kit and lastly the 160mm pulley with the 5PK583 belt. I believe this is the correct belt size. It was already too tight before using the cradle belt tensioner. Next step is now to arrange this week to have the car remapped and see what the performance output will be. Driving back home I had the meth kit disengaged (wait until the car is remapped), but up to 4500rpm the boost gauge showed me 8psi! I did not push it further want the engine safe until the upgrade has finished. Happy with the result though. Here are some pictures of today's work.