RHS™ Pro Action™ 235cc Small Block Chevrolet Cylinder Heads
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OVERVIEW

Pro Action™ 235cc cylinder heads by RHS® deliver exceptional performance gains for all Small Block Chevrolet owners.

Available in both aluminum and cast iron in a wide variety of intake runner and combustion chamber volumes and spark plug configurations. Pro Action™ heads accept valve spring diameters up to 1.550” and work with all popular SBC valve train components.

 

FEATURES:
 Multi-angled intake valve seats
Radius exhaust valve seats
Improved valve guide design
Highly efficient water jacket
Manganese intake valve guides
Bronze exhaust valve guides
Hardened valve seats
Extra-thick deck faces
 


 
This seal ensures that all assembled RHS™cylinder heads use top-quality COMP Cams® components for maximum durability and performance.
  
 
 
Click here for information about Small Block Chevy 180cc cylinder heads Click here for Pro Action 200CC Small Block Chevy Cylinder Heads Click here for Pro Action 220CC Small Block Chevy Cylinder Heads
 

RHS® Pro Action™ 235cc cylinder heads are the perfect max-effort head for larger displacement and stroker Small Block Chevrolet engines. Ideal for 383 through 421+ cubic inch pro street and oval track/drag race engines, Pro Action™ 235cc cylinder heads are the hot ticket to making up to 650+ flywheel horsepower.


RPM RANGE
 4500-8500 4500-8500
COMBUSTION CHAMBER VOL.
 64cc 72cc
INTAKE RUNNER VOL.
 235cc 235cc
FINISH
 AS CAST AS CAST
APPROX. HP
550-650 550-650
PEAK AIRFLOW, INTAKE
 312 CFM @ .700" LIFT 312 CFM @ .700" LIFT
PEAK AIRFLOW, EXHAUST
195 CFM @ .700" LIFT 195 CFM @ .700" LIFT

VIEW COMPLETE PRO ACTION™ 235CC FLOW CHART
INTAKE VALVE DIA.

2.080”

2.080”
EXHAUST VALVE DIA.
 1.600” 1.600”
MATERIAL
 CAST IRON ALUMINUM CAST IRON ALUMINUM
BARE CASTING
PART #
 #12323


 #12030

 #12307

 #12007
#12324

 #12032

 #12308

 #12008
FLAT TAPPET
ASSEMBLY PART #
Assembled in-house using quality COMP Cams™ components
 #12323-01

 #12030-01

 #12307-01

 #12007-01
#12324-01

 #12032-01

 #12308-01


 #12008-01
HYDRAULIC ROLLER
ASSEMBLY PART #
Assembled in-house using quality COMP Cams™ components
 #12323-02

 #12030-02

 #12307-02


 #12007-02
#12324-02

 #12032-02

 #12308-02


 #12008-02

Assembled in-house using quality COMP Cams™ components = Assembled in-house using quality COMP Cams® components

Head Gasket: Fel-Pro #1003*
Intake Gasket: Fel-Pro #1205*
Exhaust Gasket: Fel-Pro #1404*
Head Studs: ARP #234-4301*
Rocker Arms: COMP Cams® #1301-16, or any
high-performance Small Block Chevy
rocker arm
Lifters: Determined by application
Pistons: Determined by application
Pushrods: Measure for Correct Length
Manifold: Determined by application
Spark Plug: See model-specific tech sheet
Head Torque: See fastener manufacturers specs
Intake Valve: Stainless 2.020"
Exhaust Valve: Stainless 1.600"
Flat Milling: .006” per cc
Valve Angles: 23° intake/exhaust
Chamber Size: 64cc or 72cc
Other: -

*Suggested components only. Individual application must be verified.
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