At the end of the exhaust there's this ~10 inch chrome piece which forms the 2 or four exhaust outlets that signify the model. If it's not fitted the pipes stop short of the numberplate plinth by a few inches....if you drive like this in a hot climate it destroys the number plate light (see image)
There's an enormous amount of hot gas coming outta there! Believe it or not the lamps still come on..they're just covered with the remains of the previously-molten plastic lens....Luckily enough I found a replacement on eBay :-)