These valve covers are in the polish finish and are on special because of blemishes. These can be machined for PCV and breather holes. There is a machining charge. Call to order that option. A gasket is available.
One cover has excessive porosity. Porosity are small pinprick holes in the surface. All polished sand cast aluminum parts have some porosity but on this one cover, the porosity is all over and very small.
The other cover has discoloration between the fins and script.
For reference, see our regular Chevy Small Block, 1959 to 1986, CORVETTE Script and Fins, PML Part Number 11026.
This special should fit and function like a regular part.
This is sold as-is and cannot be returned. Be sure to go through our CHECKLIST.
Top view of valve covers.
Inside of valve covers.
Example of large amounts of porosity on first valve cover.
Discoloration between fins and script on second valve cover.