Your box will still work with your flash. I had the 2nd gen H&S box on before and after I got the G30 and AX flash with no troubles. I now have the 3rd gen plug and play from them on now. The only differance I have noticed is the dpf delete throws the OHC crazy now from the AX versus my original flash which said system OK always with the dpf delete. I do clear codes on start up but I wanted to see if I got the same cat full message as others did when they got the AX flash and it does now. But everything is good and dash light free as long as I clear codes on start up.