Typ4 is Russ. He is a member here from oregon. Really a great guy too. Knows plenty about thes trucks and motor too. I think he knows more about turbos than anyone on this forum. He can rebuild or upgrade many differant makes. PM him any questions... Install a set of BB code injectors. They will outperform the G codes all day long...
What model and years did the BB code injectors come on? Do they require any modification?