This is a great hop-up !
One of the first things you have to change if you wanted to make your DB-01 a true competition buggy !
On the stock DB-01 you have the dog bones scratching in the cups, so the car 'brakes' in the corners, with these kit your steering angle is way bigger and they won't brake in the corners by full lock.
And if you are lowering the DB-01, or set it higher, with the stock stuff, they are scratching allready, so your car is 'braking' and the motor and ESC would be warmer as normal.
With these shafts you just don't have these problems !
This kit comes with 2 shafts, 2 knuckles, 2 ball bearings and some stuff to put it together, so you don't have to buy something extra to instal it to your car.