Unlike the NPP valves, the AFM valves are checked at every startup. See below for what people have done:
1. Get a custom tune.
2.
https://www.camaro6.com/forums/showt...=473084&page=3 (see post #42)
3. Buy an X pipe that has the AFM valves (Flowmaster) or dummy AFM valves (AWE).
Hope this helps.