B&M Line Lock Valve Kit w' Button Evo 789 Threads are rolled after heat

Threads are rolled after heat treat to ensure optimum fatigue strength

especially during threshold braking

keeps the engine at proper timing

Eliminates undesired sway bar pre-load

¼”  black nylon side mount spacers

B&M Line Lock Valve Kit w' Button Evo 789 Threads are rolled after heatB&M Line Lock Valve Kit w' Button B&M launch controls are the choice for performance and dependability and can be used to control either your front or rear brakes. They're intended primarily as brake locking devices for drag racing, but they also can be used on the street as hill holders. They're available either as complete kits or as just the line lock units themselves.