RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads

[CPG Marketing]

New SBC 228cc runner heads from RHS™ provide maximum airflow for circle track & drag racing classes that require the use of cast iron cylinder heads

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.

Before CNC machining even occurs, these revolutionary cylinder heads are designed using the RHS™ exclusive Clean Cast™ Technology to deliver superior port-to-chamber transitions for greater airflow. The CNC-ported 228cc intake and 82cc exhaust runners optimize volume, atomization and velocity while the 69cc 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 2.055” multi angle intake and 1.600” radiused 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 engine “hot spots” and an extra-thick deck to allow angle milling. The thick deck surface also improves head gasket retention in boosted and nitrous applications. For racing classes that mandate cast iron head use, RHS™ has designed a race-winning cast iron head that utilizes the latest in cylinder head technology.

For more information about the RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads or any other RHS™ product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads
Part Number: #12326 (Straight Plug); #12327 (Angle Plug)

Features & Benefits:
• SBC 23-degree iron cylinder heads for iron-mandated circle track & drag racing
• CNC-ported 228cc intake & 82cc exhaust runners
• 2.055” multi-angle intake & 1.600” radius exhaust seats
• CNC-ported 69cc combustion chamber relieves valve shrouding & improves airflow efficiency

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