Beautifully CNC created alloy valve covers https://pbase.com/9146gt/image/153955554 I will tone them down with ZepAlum to get rid of the polished shiny finished. The ZepAlum will etch the surface given it a more natural aluminum finish.

A closer look at the 6-bolt upper valve covers https://pbase.com/9146gt/image/153955569, and the opposite side https://pbase.com/9146gt/image/153955571

In order to improve the sealing surface, the normally leaky lower valve covers were designed with an 11-bolt pattern https://pbase.com/9146gt/image/153955567, here is the opposite side https://pbase.com/9146gt/image/153955573