dude i'm sure if he wants to put a big engine in he doesnt need a racer....common sense and the gt is just as good if not better and has tons more hop ups and if he puts a big engine in he will probably want to check out a titanium chassis and parts cuz they are lighter then aluminum and stronger so yea it weighs it down alot more than plastic but not aluminum....if u dont want it to break and u have the cash and the engine with power then u dont need to worry about the wieght as much cuz it will still smoke alot of other gts and it wont break like the others cuz it will be stronger