Page 9 of Cylinder Heads by Edelbrock

index qwikdata shocks suspension exhaust access water pumps nitrous cams access heads efi manifolds install items gaskets fuel pumps carbs access crate engines superchargers kits power pkg cylinder heads big-block chevy b/b chevy street legal street high-performance performer performer rpm 454-o · these oval port heads will support over 540 hp with 9.5:1 edelbrock b/b chevy heads fit compression when used as part of the total power package mark iv gen v and · unique oval intake port shape produces flow similar to gen vi blocks rectangular ports but the smaller port size provides excellent seat-of-the-pants performance and crisp throttle response · semi-open chamber design maximizes efficiency with streetable compression ratios · smaller-than-stock 11/32 valve stems promote excellent flow and lighter valve weight performer and performer rpm 454-o heads feature 110cc combustion chambers with a semi-open design to maximize combustion efficiency with streetable compression ratios performer 454-o chamber size intake port size valve sizes in/ex bare single complete single 110cc 290cc 2.19 1.88 60469 60479 performer rpm 454-o chamber size intake port size valve sizes in/ex bare single complete single 110cc 290cc 2.19 1.88 60449 60459 polished performer rpm 454-o 110cc 290cc 2.19 1.88 n/a 604519 performer rpm 454-o retains the stock exhaust bolt pattern and port location for compatibility with exhaust manifolds or headers performer 454-o heads are street legal in all 50-states performer rpm 454-o #60459 performer high-compression 454-o · 100cc semi-open chamber heads feature a 1-1/2° rolled over angle milled design that improves intake port alignment and provides a smaller combustion chamber without shrouding the valves · 9.2:1 compression with flat-top pistons for an outstanding high performance street head · 8.8:1 compression ratio when used on 1987-up tbi-equipped 7.4l dished piston motors · produced over 450 ft/lbs torque when combined with our multi-point efi system in a late model application performer high-compression 454-o chamber size intake port size valve sizes in/ex bare single complete single 100cc 290cc 2.19 1.88 60489 60499 100cc combustion chambers are ideal for 1965-70 396 engines performer high-compression 454-o retains the stock exhaust bolt pattern and port location for compatibility with exhaust manifolds or headers performer high-compression 454-o #60499 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 148

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