On FJ40’s built before 7/1970 the original brake master cylinder is a single outlet, non power-assist type that feeds 8 wheel cylinders. Braking performance is lackluster to say the least. For customers that are converting to disc brakes, or simply want better braking we have put together a kit that adapts a Wilwood dual outlet (tandem) brake master cylinder to the original firewall location. Kit includes Wilwood Brake Master, firewall adapter and mounting bolt configurations.