Arena scene from FlatOut 2 game for Autodesk 3ds Max 2010 and above. Formats: max, fbx Texture format: png Polygons: 40,573 Vertices: 47,529 Lack of details: dynamic cones and tires from cars. Slightly trimmed extra terrain plane outside the track.
p.s. To scale to gta sa, first increase to "5000" along the "X" axis, then back along the same axis, but only to "100", so the model will have a normal size.