HW9505-3 – Plain Steel Stepped Lid Insert – The Stepped Lid Insert is the perfect addition to the Billet X Master Cylinder if you have the Stepped Lid Option. This insert can be painted to suit your application. Simply remove the adhesive tape and place in the center of the lid. Laser cut from 0.060″ thick 16ga Steel and then tumbled, it’s that final touch that makes your engine compartment one of a kind.