Page 10 of Heads 2008 by Edelbrock

power pkg kits superchargers crate engines carbs access fuel pumps gaskets install items manifolds efi heads cams access nitrous water pumps access exhaust suspension shocks qwikdata index big-block chevy cylinder heads b/b chevy street legal street high-performance continued performer rpm 454-r · designed for street/high-performance big-blocks operating from 2500-7000 rpm · specially designed ports for increased flow and velocity over standard big-block heads · highly-efficient 118cc open-style combustion chamber · high-velocity 315cc long/300cc short intake ports · smaller-than-stock 11/32 valve stems promote excellent flow and lighter valve weight performer rpm 454-r chamber size intake port size valve sizes in/ex bare single complete single 118cc 315/300cc long/short 2.19 1.88 60549 60559 polished performer rpm 454-r 118cc 315/300cc long/short 2.19 1.88 n/a 605519 notes for all performer and performer rpm b/b chevy heads spark plug is closer to center of bore will interfere with high-dome pistons for open chamber heads use pistons designed for our heads see chart on pages 168-169 for specs match with edelbrock gaskets 110cc exhaust ports are in the stock location for compatibility with most headers performer rpm 454-r #60559 has 118cc combustion chambers with 2.19 1.88 stainless steel swirl-polished valves polished performer rpm b/b chevy head #605519 performer rpm 454-r #60559 b/b chevy marine marine-duty performer rpm 454-o and 454-r · heavy-duty 1.89 inconel exhaust valves provide added durability for marine applications · hard anodized black to protect the aluminum in the harsh marine environment · sold with valves only to allow for valve spring choices · match with an edelbrock performer rpm manifold performer series 750 cfm marine carb and performer rpm cam for proven performance · smaller-than-stock 11/32 valve stems promote excellent flow and lighter valve weight performer rpm 454-o marine oval port chamber size intake port size valve sizes in/ex bare single complete single 110cc 290cc 2.25 1.89 n/a 61459 performer rpm 454-r marine rectangular port 118cc 315/300cc long/short 2.25 1.89 n/a 61559 marine-duty performer rpm 454-o #61459 features 290cc intake ports with our unique port entry shape for use with edelbrock oval port intake manifolds for big-block chevy marine-duty performer rpm 454-r #61559 features 315/300cc rectangular intake ports for high performance engines which require more airflow marine-duty performer rpm heads are hard anodized black for corrosion resistance and they include heavy-duty inconel exhaust valves 110cc combustion chambers are fitted with stainless steel 2.25 intake valves and 1.89 inconel exhaust valves important notes · bare heads will have valve guides and seats installed but will require final sizing and a valve job to match the valves you will be using · recommended spark plugs for most street applications are champion rc12yc not legal for sale or use on pollution controlled motor vehicles notes for all performer and performer rpm b/b chevy heads spark plug is closer to center of bore by .150 and will interfere with high-dome pistons designed for o.e open chamber heads use pistons designed for our heads see chart on pages 168-169 for specs match with edelbrock gaskets www.edelbrock.com 149

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