Do you use high low boost atol? I've been told we don't need it in this country as it's for bad conditions in japan. I'm not sure how the boost is controlled I.e ecu or something else. The pipes I think you mean to through a actuator type solenoid switch on the o/s front of the engine bay next to the abs unit, You can just bypass the switch thing and I'm sure it gives you .8 bar constant , Some one can correct me if wrong Hope this helps Gary