Customer required a drifting hand brake and the best way to do it is with an independent hydraulic circuit and caliper. You guys must not be keeping up with Formula Drift technology based on the comments here. The standard braking system is compromised if another master cylinder is added to the same circuit. Adding a couple pounds isn't critical for a drift car with a solid axle.

Why not try to reinvent the whole rotor assumbly by possibly making it an electromagnetic brake instead of fluid. Like when the router is spinning, instead of having the caliper grab it, it could force it in the opposite direction of the direction of the car to slow it down. Therefore you'll never have to change your brake pads again

I know you guys know what you are doing, so I am very confused why this is necessary and how the unsprung weight penalty is worth it. Tell us your secrets! :)

Gotta go with Joe on this one, you guys are legends, but between the unsprung weight, added complexity and massive stopping power of modern multipiston setups; I would love to know the advantage

It's for drift cars. Real track cars don't need that.

Awesome...but why?

Used for drift cars