this kit is poor, instructions are wrong, extra parts not needed, tires did not fit axials, rubber tires hard as a rock (due to age), fit and finish poor (windows),motor weak (replaced), gears did not mesh properly, all in all a poor kit .Made my mind up not to buy polar lights batmobile after working on this slot car. None of this is the sellers fault. Diffidently not worth the money, Had to use another frame to achieve what I needed. Kit frame alright, but way to heavy,