I bought this to convert a go kart's weak braking system to hydraulic. First, there is no documentation. I had no idea how to connect that to the pedals. Second, there are no karts with front disc brakes. I liked the idea and my son is a welder so I thought we could do something. Not correct. Spindles cannot be found. hubs too. This quickly became a very expensive project. I would only recommend this product if you are doing a one to one exchange with the same product.