I was just wondering how you tell which savage model you have? I bought a used one recently I'm thinking it came with the 4.6. Has huge tires on it with nubs still on them, real nice radio from the looks of it haven't got to play with it yet. Everything seems to be in good shape. Got it for $115 shipped. The motor was said to not been working but it seems to have good compression. Havent got to try to start it need a glow plug ignitor. I can't get mine from traxxas to work on there. Wire wont go on the glow plug.