[MetalMan]

Probably the two biggest upgrades are the new gray tranny case and the slipper clutch (although the old slipper clutch was fine). I've gone through two diffs already with the stock plastic tranny case in the 10mins I drove my Rustler. I had to revert back to plastic because I bent the motor plate on my aluminum FLM case (I'm glad they have a warrantee!).