These parts are on special because they were a preliminary design. This design included a raised area on the casting that could be used for a cable support clip.
On some vehicles there is a brake line cable that is held inplace at the top of the differential cover. The design did not work out. The raised area need not be used.
Since these parts were a preliminary design the casting finish is rougher than on a production part.
We have several of these available. The part that is pictured and is representative of all the parts on special.
For reference, see our regular GM 9.5 14 Bolt With Clearance For H2, TBSS, SSR, PML Part Number 10303-2.
This special should fit and function like a regular part.
This is sold as-is and cannot be returned.
Picture of inside:
An image of the raised area on top of differential cover for the cable clip/bracket:
Scratch marks from the casting process:
Roughness in casting finish between fins: