you don't need a boost bypass valve solenoid. its job is to cut boost while you are in reverse and when the traction control activates. sometimes it causes issues with boost, and you don't have as much as you should, so a lot of people do the delete. ZZP has the gasket kit, but if you look on rock auto you can find the complete gasket kit cheaper. some gaskets can get reused, others absolutely can not, like head gaskets.