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I have a 950hp Camaro that they already dislike. I could throw open headers on the Tahoe and they’d still be happier with me lolIf you have picky neighbors they may start to hate you. I know its not cat back loud but its louder with valve open on cold start
What exactly is the flapper mod?
I have not. But If I tune the truck I might do the dod delete with ithe is referring to keeping OPEN the exhaust flapper valve, this is a pressure controlled flapper that moves under exhaust pressure, helps kill drone on a NON DOD vehicle...
if you have not disabled the DOD you may not wan to perform this mod, it will sound odd when DOD kicks down to 4 cyl