Correct me if I am wrong but I think you are looking for what we used to call a " line lock ". The unit fits in the brake line for the front brakes at or near the master cylinder and locks the front brakes only for preloading at the start line of a drag race or performing burn outs when a little braking is needed and you dont want to heat up the rears. It is remote activated so anywhere in the line before it splits in two is fine and for ease of release the lock/unlock button should be on the shifter or steering wheel. It really helps when you have a manual shift vehicle and only two feet to work the controls.
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