Im new to the forums and MRS4. I just got mine about a week ago and I love it so far. But I always want more. My question is what are all the parts I need and how much would it end up costing to build a RS4 540. Also, what performance do you get (mostly speed)? Thanks for any help.
You do need a 540 conversion kit or if you are handy a piece of epoxy or carbon to make your own chassis and motorplate.
Then you do neet better batteries, an 540 motor, large pinion and an ESC which can handle the motor. If you are handy and have all the stuff in the house it will cost you a few bucks. If not, you will have to invest about 150 to 200 bucks.