T4 faq

Hey well I am planning on getting a ft t4 in a few months and was wondering what brushless sytem and all that to get for it so heres some questions.

1.brushless system for racing,I want more power than I need,im using 2s lipo at the moment but i need the motor to be able to handle 3s.
2.Esc, i was thinkin mamba, yay nay?
3.any hopups i should be putting on er?
4.can i see some pics and setups you guys have for your xxxt mf2 or ft t4s?
( im asking the losi because my dad has it)
5.At the track I saw a guy that on his rear tires of his t4 there a small bar looked like on the a-arms swinging over to i think the motor, i may be wrong i just glanced at it, he said it helped a bit and i am wondering what its called and what it does if anyone knows.

Thanks alot, and I figure since I will have alot of questions on this car that I should just start a t4 faq so everyone could ask questions and new people like myself could look in here and pick up a few things.