No not at all. It's to be used with the existing rear calipers while maintaining the ability to use the foot brake during regular driving. The drift scene is pretty popular with this type of setup. I believe theres a valve of some sort inside the handbrake itself that doesn't allow brake pressure to push toward the master cylinder when pulled. But when it's not pulled, that same valve is opened to allow the brake pressure from the master cylinder to flow, through the staging brake, and to the rear calipers via the foot brake.