RHS Pro Action Cast Iron SB-Chevy Cylinder Heads Product images may differ from actual product appearance. These heads deliver significant gains in both power and torque for all Small Block Chevrolet applications - right out of the box. Pro Action SBC Heads are the perfect choice for a variety of performance engines, including street rod, muscle car, oval track and drag racing applications. Standard features include a multi-angle Serdi valve job and the choice of straight or angle plug configuration. Valve springs up to 1.550" and all standard rocker arms and valve train components are accepted. Key Features: Advanced port/runner/chamber design & modified water jacket for optimal performance & added reliability Standard features include multi-angle intake & radiused exhaust valve seats for up to 5% more airflow than the competition

784-12301-01

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12302-01

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12317-01

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12318-01

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually More info on RHS 12318-01 Fits Applications

$537.99 Ships 06/06/12

784-12303-01

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12304-01

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12319-01

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12320-01

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually More info on RHS 12320-01 Fits Applications

$537.99 Ships

784-12333-01

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12334-01

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12304

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 74cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves Angle Plug Bare, Sold Individually View this item Fits Applications

$352.99 Ships

784-12305-01

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12306-01

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12321-01

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12322-01

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually More info on RHS 12322-01 Fits Applications

$537.99 Ships 06/06/12

784-12335-01

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12336-01

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12307-01

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 64cc Combustion Chambers 2.080'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12308-01

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 72cc Combustion Chambers 2.080'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12323-01

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 72cc Combustion Chambers 2.080'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12324-01

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 64cc Combustion Chambers 2.080'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .560'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$537.99 Ships 06/06/12

784-12301-02

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12302-02

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12317-02

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12318-02

23-Degree Pro Action Cast Iron Cylinder Head 180cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12303-02

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12304-02

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12319-02

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12320-02

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Dual Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually More info on RHS 12320-02 Fits Applications

$591.99 Ships 06/06/12

784-12333-02

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12334-02

23-Degree Pro Action Cast Iron Cylinder Head 200cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12305-02

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Dual Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12306-02

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Dual Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12321-02

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Dual Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12322-02

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Dual Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually More info on RHS 12322-02 Fits Applications

$591.99 Ships 06/06/12

784-12335-02

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Dual Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12336-02

23-Degree Pro Action Cast Iron Cylinder Head 220cc Intake Ports 50cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Dual Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12307-02

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12308-02

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Straight Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12323-02

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 72cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Ships 06/06/12

784-12324-02

23-Degree Pro Action Cast Iron Cylinder Head 235cc Intake Ports 64cc Combustion Chambers 2.020'' Int/1.600'' Exh Valves 1.460'' Dia. Single Valve Springs, .600'' Max Lift Angle Plug Assembled, Sold Individually View this item Fits Applications

$591.99 Manufacturer's Availability Date Unknown