Proflow valve cover grommets are designed to be installed in steel and aluminium valve covers, suiting breather caps, PCV valves, and block-offs. All grommets have a 1.25” OD. Suits thin sheet metal valve covers 

Proflow valve cover grommets are designed to be installed in steel and aluminium valve covers, suiting breather caps, PCV valves, and block-offs. All grommets have a 1.25” OD. Suits thin sheet metal valve covers