The reinforced parts that are included in the TT-02D kit are grey the standard parts are plain black like the rest of he chassis parts.
Nope, my kit didn't come w/ the hardened parts (lighter grey color).
I ordered the TT-02D type S kit. ...it came w/ a lot of goodies, but not the hardened parts.
So, I am going to order that part, ...going to hunt it down. (I hate the large bumper piece sticking off the back).