HomeAll RepliesRe: Camaro ZL1 Exhaust too loud? Re: Camaro ZL1 Exhaust too loud? Sponsored August 15, 2012 at 5:10 pm #40495 juleryParticipant I found it was racing engine exhaust pipe move . would open up at 2000 rpm and close 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