RHS® now offers a 23˚ aluminum head for Small Block Chevy applications that is CNC-ported from the factory for precision accuracy and durability. 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. CNC-machining the combustion chamber also improves 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˚ SBC heads feature a refined water jacket for better water flow that reduces engine hot spots, while an extra-thick deck allows angle milling and improves head gasket retention in boosted and nitrous applications. RHS® has designed a race-winning aluminum head that utilizes the latest in cutting-edge design technology to maximize airflow and boost horsepower in both circle track and drag racing classes.
CNC-ported 228cc intake & 82cc exhaust runners
2.055" Multi-angle intake & 1.600" radiused exhaust seats allow for superior airflow for increased horsepower
CNC-ported 69cc combustion chamber relieves valve shrouding & improves airflow efficiency when valve is too close to chamber wall
Clean Cast Technology™ delivers superior port-to-chamber transitions for greater airflow efficiency right out of the box