If you've ever driven a car with a hand operated parking brake, you've probably found at some point the easiest way to initiate a drift is to pull that lever and lock the rear brakes up. Instant glorious drifting bliss, unless you are headed into a curb.
The solution is an independent hydraulic brake system for the rear wheels. On many dedicated racing cars this can be achieved by simply tying into the existing hydraulic brake system so that when you pull the lever, only the rear brakes are affected.
This can be an issue on some newer cars and cars with certain types of Anti Lock Braking systems. The computer becomes confused and can lock up individual wheels unexpectedly.
The simplest way to do this is to add a second disc brake caliper to the rear wheels. This second caliper is connected only to the hand brake in the cabin. As far as the ABS system is concerned, all is well.
Our fabrication guys know how to build a custom system for effective operation, including how to get that large lever installed in the cockpit without tearing up the interior.
On the drifting course, the secondary hydraulic system can handle the abuse of being applied while the throttle is open all the way. By removing the slack of the cable, the driver can better feel the edge of traction with the rear wheels.
Make sure then when you add performance parts to your car you go beyond the simplified information from forum etc. Talk with the experts who actually build high performance. It's your money and your car. Do it right.