Riddler Manufacturing Dana 44 Front and Rear Differential Cover Reviewhttp://tinyurl.com/ogxfuls Riddler Manufacturing Dana 44 Front and Rear Differential Cover Recess for Rubicon locker actuatorLip Free, Smooth Transition Design with Recessed FastenersCast from High Grade Ductile Iron5/16" Wall ThicknessHardware and Permatex Sealant included