These billet coil covers are specifcally designed to accompany the Indy Power Products billet valve covers.  They work with both the original equipment 7.3L Ford coils as well as the GM D585 smart coils.  These are designed for wiring to be routed under the cover, with machined slots at both ends for a clean look.  After hardcoat anodizing the fins and lettering are fly cut creating a sharp contrasting look.  Sold as a pair.