Aeroflow’s Launch Control (Roll/Stage/Brake Control, Line Lock, Roll Stop, and Anti-Roll). Aeroflow’s 12 Volt 2-Port Launch Control is designed to be installed into the vehicle's existing brake system and can be used on either the front or rear brakes (Not for split or diagonal brakes). In & out ports are 1/8” NPT. They are intended primarily as brake-locking devices for Drag Racing and Off-Road use.