As other have mentioned, the interior is loud if you have older, cupped or combination of both tires. They will roar inside the cabin of a coupe, to the point I needed to put on earplugs until I got new tires.

I did make the dumb mistake of putting on a Flowmaster Super 44 muffler, which was the most drony muffler I've ever heard. I bit the bullet and changed it out for a Flowmaster 60 series and now it's perfect. Just enough sound so I can get my rev-matching downshifts perfect with little drone.

These old cars just don't have the modern insulation of current vehicles. Case in my point is my RAM Rebel with a Hemi V8, I installed a very aggressive Flowmaster Outlaw race muffler and it has no drone at highway speeds. Just modern insulation and noise cancellation that the Crossfire doesn't have.