what will cause a loud roaring sound while driving my 2003 chevrolet cavalier?

[jlthomas75844]

i have a 2003 chevrolet cavalier 5-speed standard transmission with 23000 miles on it,it sounds like i am driving on a flat tire at any speed

[jeremy_schaufler]

muffler falling off

[lexusry]

the common problem is exhaust manifold is cracked which create a loud roar sound.next inspect the exhaust system for leak

[jason a]

you could have a brake rotor problem.if you had your brakes hot the rotor can warp and scrub your brakes causing a roaring problem