This FRONT LEFT regulator is provided with window TRAVEL STOPS for certain 986 (Boxster) and 996 (911) cars. The upper Boxster stop must be removed when installing on 996 or window will not go all the way down. Does NOT include electric motor, original motor must be reused Patent-pending premium ball-bearing pulley design greatly reduces internal cable friction for smooth movement and long life Unique pulley profile improves cable retention during challenging frozen or sticky window operation Quality cable sheathing resists compression to maintain proper cable tension