The Mazda RX-8 from NFS Carbon. (although the mesh is likely identical to the Most Wanted one)
No custom handling included, this is the vehicles.ide line I use (uses Coquette handling):
rx8, rx8, car, COQUETTE, COQUETTE, VEH@STD, NULL, 30, 999, 0.2417, 0.2417, 0, 5, 1.0 ,0, sports
Known issues:
Doors don't work correctly (Carbon only seperates the outer door mesh, so the interior side of the door doesn't move)
Damage makes you able to see inside the car (Carbon car models weren't made with IV's damage model in mind, so detached bumpers, hood and trunk reveal huge holes in the mesh)