RHS™ Pro Action™ 180cc Small Block Chevrolet Cylinder Heads
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OVERVIEW

Pro Action™ cylinder heads by RHS® deliver exceptional performance gains for all Small Block Chevrolet owners. Available in both aluminum and cast iron, and in a wide variety of intake runner and combustion chamber volumes. Pro Action™ heads feature straight or angled spark plug configurations, accept valve spring diameters up to 1.550”, and work with all popular Small Block Chevy 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 Pro Action 200CC Small Block Chevy Cylinder Heads Click here for Pro Action 220CC Small Block Chevy Cylinder Heads Click here for Pro Action 235CC Small Block Chevy Cylinder Heads
 

RHS® Pro Action™ 180cc cylinder heads are the perfect bolt on head for smaller-displacement Small Block Chevrolet engines. Ideal for 262 to 350 CID street engines, Pro Action™ 180cc cylinder heads are the hot ticket to making up to 325+ flywheel horsepower.


RPM RANGE
 1500-6500 1500-6500
COMBUSTION CHAMBER VOL.
 64 cc 72cc
INTAKE RUNNER VOL.
 180cc 180cc

FINISH

 AS CAST AS CAST
APPROX. HP
325+ 325+
PEAK AIRFLOW, INTAKE
 270 CFM @ .700" LIFT 270 CFM @ .700" LIFT
PEAK AIRFLOW, EXHAUST
195 CFM @ .700" LIFT 195 CFM @ .700" LIFT

VIEW COMPLETE PRO ACTION™ 180CC FLOW CHART
INTAKE VALVE DIA.

2.020”

2.020”
EXHAUST VALVE DIA.
 1.600” 1.600”
MATERIAL
   CAST IRON ALUMINUM CAST IRON ALUMINUM
BARE CASTING
PART #
 STRAIGHT
PLUG

#12317

#12022

#12301

#12001
ANGLED
PLUG		 #12318

#12023

#12302

#12002
FLAT TAPPET
ASSEMBLY PART #
Assembled in-house using quality COMP Cams™ components
 STRAIGHT
PLUG		 #12317-01

#12022-01

#12301-01

#12001-01
ANGLED
PLUG		 #12318-01

#12023-01

#12302-01

#12002-01
HYDRAULIC ROLLER
ASSEMBLY PART #
Assembled in-house using quality COMP Cams™ components
 STRAIGHT
PLUG		 #12317-02

#12022-02

#12301-02

#12001-02
ANGLED
PLUG		 #12318-02

#12023-02

#12302-02

#12002-02

 

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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