Update..........I checked Youtube and the movie version of the song is not the same one, so here is a link to the track
http://www.youtube.com/watch?v=RkLXLSEvMLw
The song is 7min 27sec but the jam starts at around 3:10 (so over half the track is the jam!)
In listening to it, could it simply be an octave pedal? I used to have the brown Boss Octave 2 pedal and thinking about getting it again (and I see they have an Octave 3 now). Though it sounds like it, I think that pedal might be too cut and dry and not as dirty and smoothe (if that makes sense at all). Of course, it's how it is played too......