Pro Action™ BBC 24° (320cc Intake Runner/119cc Chamber) Bare Aluminum Cylinder Head

• 320cc Intake Runners & 119cc Chambers

• 2.250" IN. & 1.880" EX. Valve Sizes

• Angled Spark Plug Holes

• Single Aluminum Head

Pro Action™ Big Block Chevy Aluminum 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.

• Patented Clean Cast Technology™ provides superior port-to-chamber transitions & optimal airflow efficiency

• Hardened multi-angle intake & radiused exhaust valve seats are utilized to outflow the competition by up to 5%

• Refined water jacket design improves thermal conductivity & extra-thick deck faces allow angle milling for compression

• Premium Bronze valve guides for superior heat dissipation & longer life

• 320cc Intake Runner and 119cc Combustion Chamber

• Lightweight aluminum construction