racing head servicetm racing head servicetm a dominant force in the history of cylinder head technology is back with a vengeance utilizing the acquired resources of pro topline cylinder heads in combination with the industry s largest engineering team and the most advanced cylinder head manufacturing foundry in the world rhstm has re-emerged as the performance cylinder head leader right out of the box racing head servicetm out of the box performance pro topline cylinder heads are now known as rhs in combination with the industry s largest engineering team and the most advanced cylinder head manufacturing foundry in the world rhstm has re-emerged as the performance cylinder head leader incorporating an advanced vertically integrated manufacturing process rhstm executes cylinder head creation from concept through final machining all in one location gone are the days of purchasing new cylinder heads only to discover that extensive final machining is required for optimum performance
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edelbrock cylinder heads cast at the ultramodern edelbrock aluminum foundry edelbrock heads are made from a356 aluminum and heat treated to t-6 specs our state-of-the-art manufacturing facility uses the latest cnc machining centers for high-degree of accuracy features for all edelbrock heads include threaded inserts in rocker studs and exhaust manifold bolt holes for superior strength and durability hardened seats and bronze valve guides minimum 9/16 deck thickness fully machined valve cover rails for a more consistent gasket seal and all edelbrock heads are designed to accept high-lift cams performer rpm heads for amc/jeep edelbrock now offers power and torque increases to owners of 1967-91 amc and jeep 343 360 390 and 401 engines features an efficient 54cc dual-quench combustion chamber a reconfigured intake valve seat angle improves mid-to high lift flow requires step washer kit for 1969 and earlier engines with 7/16 head bolts no exhaust crossover port description part no amc/jee
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edelbrock cylinder heads cast at the ultramodern edelbrock aluminum foundry edelbrock heads are made from a356 aluminum and heat treated to t-6 specs our state-of-the-art manufacturing facility uses the latest cnc machining centers for high-degree of accuracy features for all edelbrock heads include threaded inserts in rocker studs and exhaust manifold bolt holes for superior strength and durability hardened seats and bronze valve guides minimum 9/16 deck thickness fully machined valve cover rails for a more consistent gasket seal and all edelbrock heads are designed to accept high-lift cams rpm xtreme for ls semi-cnc designed for 1997 and later gen iii ls series engines including 4.8l 5.3l 5.7l 6.0l cnc-ported 65cc combustion chambers with port matched and blended intake/exhaust ports 212cc intake ports flow 275 cfm 75cc exhausts flow 200 cfm description 97-later gen iii ls 4.8l 5.3l 5.7l and 6.0l complete single part no 61949 #61949 rpm xtreme for lt4 semi-cnc stock replacement fo
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edelbrock cylinder heads cast at the ultramodern edelbrock aluminum foundry edelbrock heads are made from a356 aluminum and heat treated to t-6 specs our state-of-the-art manufacturing facility uses the latest cnc machining centers for high-degree of accuracy features for all edelbrock heads include threaded inserts in rocker studs and exhaust manifold bolt holes for superior strength and durability hardened seats and bronze valve guides minimum 9/16 deck thickness fully machined valve cover rails for a more consistent gasket seal and all edelbrock heads are designed to accept high-lift cams performer heads for ford edelbrock performer 50-state street legal heads provide outstanding bolt-on performance for street high performance 1965-95 289 302 and 351 windsor v8s capable of 300 horsepower when matched with the edelbrock performer power package performer heads #60359 have high-flow 2.02 intake valves for use with aftermarket pistons notched for valve clearance top-quality 3/8 rocke
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