Gexal Crankshaft

I pulled the trigger on a Range AFM disables last night. That should be the end of that. ?

The muffler tech specifically put his finger on the flex pipe and said that I need to keep that unless I program the truck to stay in V8 the whole time, which isn’t a bad idea, but all the videos I’ve watched on YouTube seem to not show that being a problem. I don’t know. All this high tech crap is starting to bug me.

I just purchased a 2018 1500 Silverado 3 weeks ago. I want a better exhaust sound so I ordered a MBRP single exit kit. I took it up to the local muffler shop and they are telling me that I have to keep the exhaust flex pipe in line or I will have a terrible noise when the truck eco-tecs into 4 cylinder mode. Can anyone confirm this. I wasn’t sure about that, so I loaded up my kit and left. I don’t wanna make a mistake or get hosed.