HomeAll RepliesRe: C7 Corvette Exhaust note and Active Fuel Management Re: C7 Corvette Exhaust note and Active Fuel Management Sponsored February 12, 2013 at 10:44 pm #41084 dutchParticipant You won’t notice the 8 to 4 and 4 to 8 in the stock system because it is quiet. Put a set of flow master 40’s on and you will definately hear it. Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored