These 5/16" FAT gaskets are manufactured using a premium Cork/Rubber Nitrile compound. The added height of these gaskets provides more clearance for tall rocker arms. Sold in pairs. Do not use these gaskets for Hamburger's Econo-Series Oil Pans! Will cause pan flange damage.
 
Part # ProductDiameterEngineFinishHeight Media
9644 5/16" Thick Valve Cover Gaskets (CORK); 1955-86 Chevy V8 265-350 Chevy SB 265-350; '55-86
Photo
$23.97
9645 5/16" Thick Valve Cover Gaskets (CORK); 1965-95 Chevy V8 396-502 Chevy BB 396-502; '65-95
Photo
$46.38
9646 5/16" Thick Valve Cover Gaskets (CORK); Ford V8 260-289-302-351W Ford SB 260-351W
Photo
$39.81
 
http://hedman.com/images/ePIM/original/9644-L.jpg
http://hedman.com/images/ePIM/original/9645.jpg
http://hedman.com/images/ePIM/original/9646.jpg