How to Change the Sound of Your Car Exhaust (If Newly Installed, it WILL Change!) 

How to Change the Sound of Your Car Exhaust (If Newly Installed, it WILL Change!)
If you just got new exhaust on your car you need to drive it 500, 1000, even 2000 miles before you judge how it is really going to sound.
IMO the more new exhaust components you put on, the more miles you need to hear how it is going to sound once it is “broken in”. So new flowmaster mufflers might break in faster than if you do headers, full exhaust and new mufflers.
Just me sharing my experience.