Nice brakes, just a little bit bright.
And.. select all your scene-go to Group- Ungroup. Click one time on my wheel, because by the reflections I thought you imported twice. maybe you have 2 wheels in the same space. try to erase one.
NICE! but your wheels are not as I like but, this is your render
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Now talking with everybody.
Guys, you just tweak XRT. I think you could have some more creativity, like, tweaking another cars. XRT is getting boring with a billion of tweaks.
Dude, when u download a LFS scene, u don't need to change materials, because almost all cars that u download has Brazil material, so, to use V-Ray, u NEED to change it.
Go to Render setup, then, Common\Assign renderer, then choose V-Ray 1.50 (or the one u have. i have 1.50).
Then, download Brazil to whatever 3ds max, then open the 3ds max with Brazil, look the materials; go to the 3ds max with V-Ray;go to the materials window; look the objects that is written: ...(missing file); then back to 3ds max with Brazil; look the name of the material(like, number 1 in vray=missing file, is the number 1 in Brazil=wheels); then go to http://www.vray-materials.de/ and search for the material you're looking for(in this case wheels);download, and then apply it.