If you are engine swapping your BRZ or 86, you'll likely need a way to get the clutch master cylinder out of the way of your new engine.  But not everyone wants a prebuilt kit for a common engine/transmission combo.  This recessed mount allows the installation of a Wilwood Compact Master Cylinder or the Tilton 75 Series Master Cylinder, behind the firewall.  This leaves only 2.5 inches of master cylinder and hardware protruding into the engine bay, for maximum clearance. Left hand drive only.