RHS™ Pro Action™ 220cc Small Block Chevrolet Cylinder Heads
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OVERVIEW

Pro Action™ 220cc 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 235cc cylinder heads Click here for information about Small Block Chevy 200cc cylinder heads Click here for information about Small Block Chevy 180cc cylinder heads

RHS® Pro Action™ 220cc cylinder heads are the race winner’s choice for larger displacement and stroker Small Block Chevrolet engines. Ideal for 383 through 400+ cubic inch max street performance and oval track/drag race engines, Pro Action™ 220cc cylinder heads are the hot ticket to making up to 550+ flywheel horsepower.


RPM RANGE
 3500-8000 3500-8000 3500-8000
COMBUSTION CHAMBER VOL.
 50cc 58cc 64cc
INTAKE RUNNER VOL.
 200cc 200cc 200cc
FINISH
 AS CAST AS CAST AS CAST
APPROX. HP
400-550 400-550 400-550
PEAK AIRFLOW, INTAKE
 286 CFM @ .700" LIFT
PEAK AIRFLOW, EXHAUST
202 CFM @ .700" LIFT

VIEW COMPLETE PRO ACTION™ 220CC FLOW CHART
INTAKE VALVE DIA.

2.020”
EXHAUST VALVE DIA.
 1.600”
COMBUSTION CHAMBER VOLUME 50cc 64cc 72cc
MATERIAL/CONFIGURATION CAST IRON CAST IRON ALUMINUM CAST IRON ALUMINUM
BARE CASTING
STRAIGHT PLUG
 #12335

 #12321

 #12026

 #12305

 #12005
BARE CASTING,
ANGLE PLUG
 #12336

 #12322

 #12029

 #12306

 #12006
FLAT TAPPET ASSEMBLY
STRAIGHT PLUG
Assembled in-house using quality COMP Cams™ components
 #12335-01

 #12321-01

 #12026-01

 #12305-01

#12005-01
FLAT TAPPET ASSEMBLY
ANGLE PLUG
Assembled in-house using quality COMP Cams™ components		 #12336-01

 #12322-01

 #12029-01

 #12306-01


 #12006-01
HYD. ROLLER ASSEMBLY
STRAIGHT PLUG
Assembled in-house using quality COMP Cams™ components
 #12335-02

 #12321-02

 #12026-02

 #12305-02

 #12005-02
HYD. ROLLER ASSEMBLY
ANGLE PLUG
Assembled in-house using quality COMP Cams™ components		 #12336-02

 #12322-02

 #12029-02

 #12306-02


 #12006-02

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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