Hmm...
I'd have to go with a McQueen film and its not Le Mans or bullitt. Technically its not a car film so it probably doesn't count but On Any Sunday is probably the best motor sports movie ever made. GP, LeMans, Winning all have some great film (the Grand Prix footage of John Surtees rocketing around the original Spa in his Ferrari 312 in a driving rain is simply stunning, no other way to describe it) but as movies go, they're pretty awful. The chase scene in the French Connection is as good as they get and the Gumabll Rally gets a nod because its so f**k*ng funny and you get to see a 427 Cobra and a Ferrari Daytona get after it.
John