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320cc Intake Runners & 119cc Chambers
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2.250" IN. & 1.880" EX. Valve Sizes
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Angled Spark Plug Holes
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Single Aluminium Head
Pro Action™ Big Block Chevy Aluminium Heads
First-rate performance, progressive engineering and unmatched quality are the foundations of the Pro Action™ head series, and the RHS® BBC heads feature all of them and more. Capable of making up to 1000 horsepower, Pro Action™ BBC Cylinder Heads provide you with more features, better flow numbers and superior "as cast" finished quality. Fully assembled and a tremendous performer for Big Block Chevy street, drag race and powerboat applications.
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Patented Clean Cast Technology™ provides superior port-to-chamber transitions & optimal airflow efficiency
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Hardened multi-angle intake & radiused exhaust valve seats are utilized to outflow the competition by up to 5%
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Refined water jacket design improves thermal conductivity & extra-thick deck faces allow angle milling for compression
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Premium Bronze valve guides for superior heat dissipation & longer life
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320cc Intake Runner and 119cc Combustion Chamber
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Lightweight aluminium construction
Choose carefully as clearance items are not returnable for exchange or credit.