RHS Pro Elite CNC SB-Chevy Cast Iron Cylinder Heads

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Engineers at RHS have recently designed the only Small Block Chevy 23-degree cast iron head that is CNC-ported from the factory. The precision accuracy and durability of the RHS Pro Elite SBC 23-Degree CNC-Ported Iron Cylinder Heads are derived not only from the precision CNC-porting of the intake and exhaust runners but the CNC-ported combustion chamber, as well. The CNC-ported intake and exhaust runners optimize volume, atomization and velocity while the combustion chambers are CNC-ported to relieve valve shrouding that occurs in "as cast" chambers when the edge of a valve is in close proximity to the combustion chamber wall. By CNC-machining the combustion chamber, RHS was able to improve the airflow efficiency of the cylinder heads. The multi angle intake and radius exhaust valve seats allow for superior airflow, thereby significantly increasing horsepower. In addition, these 23-degree SBC heads feature a refined water jacket for more even water flow to reduce hot spots.



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