The Differential cover is a 1 piece Plate steel cap 3/8" (.375") bent 8 ways then welded to a 3/8" ring! The fill plug is a generous 1" ID for easy fill and oil level check. The D60 is our best selling cover. After welding the mounting surface is machined absolutely flat for a perfect fit!
This is for a fully welded D60 High or Low pinon Diff Cover, ready to plug & play! And for you questioning why D60 / D70, the D60 & the D70 use the same differential cover.