Part# AS0077B - Black & finned AussieSpeed valve cover for a 4 cylinder Holden Gemini engine. This rocker cover is made specially for the Holden Gemini enthusiast who wants to run the Yella Terra roller rockers on their engine, you will need a tappet cover like this to have enough height to provide clearance for the roller rockers when fully bolted down.  This Gemini valve cover looks as good as it works, it is made from sand cast aluminium, it is thick and comes with rubber grommets to take readily available aftermarket standard PCV and push in breather caps.  It also comes with extension nuts to bolt onto the original studs that the standard cover bolts to and black bolts that bolt through the cover to the extension nuts. Polished KustomBitz bolt kits available as an extra. Shown here is our black version, a polished vesion is also available.