Part is called - tower seal.
Sounds like your looking at an EDM manual. Do a little more searching to find a USDM manual you can down load. One site you can find some at is http://www.spoonertuner.com/manualsBrujo13 said:im gonna have to assume that yes you need to remove the rocker arms i was looking at thw workshop manual , and im pissed cause it has an expoded view on the doch head but not for the SOCH :x