No they do not recomend it. I did not ask them for a recomendation I simply wanted to know the flow rate at that time as I was concerned that with the bypass section it might not flow enough. I had already determined that it was the same size and that the threds were tha same. The engineering dept advised that it was designed for the ISB 5.9 and the flow rate was the same as the stratapor. They also said that they could not recomend its use as it was not approved for use by Dodge. I am not trying to persuade you or any one else to use them and I have not been using them long enough to see if there is any problems as yet. I waited until my waranty was up to start. As I am responsible for any work at this time no one will be hurt but me if it does create a problem. So far everything is going fine.