Thanks

http://www.imcdb.org/movie.php?id=101492

It was the first one (1991) with Jeff Fahey.

There were a few other cars in it but I can't rememeber, it's so long since I've seen it.

There are two movies called Body Parts
listed on IMDB, can you tell which one it was?
1991 version http://us.imdb.com/title/tt0101492/
or
1994 version
http://us.imdb.com/title/tt0200497/

Red/orange second gen Camaro in a crappy horror movie called 'Body Parts'.

Guy peels out and runs through a busy intersection after having the leg of a serial killer grafted on to his body (his leg has a mind of its own, of course).