This one
http://www.imdb.com/title/tt0452608/
Actually I thought it was better than Death Race 2000 in a way. Comes highly praised for a trashy film night. Can’t confirm this one just yet need to look in to it a bit more.
Did Superman 2 use deleted footage of Krypton for the original Superman film? Although I’m not sure this qualifies as they were shot back to back and were always intended to intermingle on the same shoot schedule.
https://en.wikipedia.org/wiki/Midway_(film)
This is another Tora! Tora! Tora! one and also uses footage from a bunch of other films. Curious if there could be any unused footage in this also from TTT.
The Final Countdown 1980 also uses footage from Tora! Tora! Tora! but again unsure if it is only stock footage.
Bladerunner & ROTJ now tied in 1st place!
Another Interesting One is Stephen Spielbergs Duel.
Footage was re-used in an episode of the incredible Hulk TV show not Sure if it is deleted footage or not? From the first season episode “Never Give a Trucker an Even Break” (originally airdate on CBS: April 28, 1978).[27] Spielberg was reportedly “not too happy about it,” according to Matheson (writer).
https://www.youtube.com/watch?v=fjhtr0vTtcw
But also in Spielbergs film 1941 he revisits the same Gas station in Duel with some of the Same actors and blows up the garage.
https://www.youtube.com/watch?v=CPnwlNvwBLI
And in the Case of Duel by Steven Spielberg it was originally shot for TV and altered to be a feature film. The voice over from the original TV cut and superimposed eyes on the road were removed.
example of inner dialogue
https://www.youtube.com/watch?v=EgoHdfqmw4A
Deleted Scene not available on DVD or Blu-ray