RHS™ Pro Action™ Big Block Chevy Cylinder Heads
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OVERVIEW

FEATURES:
 Multi-angled intake valve seats
Radiused 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

Pro Action™ 24° cylinder heads from RHS™ deliver exceptional out-of-the-box performance gains to all Big Block Chevy owners. Available in both aluminum and cast iron versions, Pro Action™ heads are a tremendous performer in a variety of applications from street/strip and marine, to pulling truck and drag racing. Regardless of material choice or application, Pro Action™ heads offer more features, better flow characteristics, and superior “as cast” finished quality – ultimately yielding more HP for your Big Block Chevy!

Winning performance, superior engineering and unmatched quality are the foundations of the RHS™ legacy. Grab a piece of that legacy for your engine with a new set of Pro Action™ Big Block Chevy cylinder heads.


This seal ensures that all heads professionally hand-assembled at RHS™ headquarters use industry leading COMP Cams® components for maximum durability and performance.



MATERIAL
Aluminum
Cast Iron		 INTAKE RUNNER
320cc
360cc		 COMBUSTION CHAMBER
119cc 		 FINISH
As Cast
 STAGE
Assembled
 Bare

 

PRO ACTION ™ BIG BLOCK CHEVY - 320cc Runner
RHS™ Pro Action™ cylinder heads are the perfect bolt on head for medium-displacement Big Block Chevys. Ideal for 396 to 454 cubic inch engines, Pro Action™  320cc cylinder heads are the hot ticket to making up to 800+ flywheel horsepower in naturally aspirated trim. With superb finished quality and a long list of desirable standard features, Pro Action™  320cc cylinder heads deliver maximum value for your performance dollar.

Head Gasket:

Fel-Pro #1027
Intake Gasket:

Fel-Pro #1275

Exhaust Gasket:

Fel-Pro #1410
Head Studs:

ARP #235-4303
Rocker Arms:

COMP Cams® #1320-16
Lifters:

Determined by application
Pistons:

Determined by application
Pushrods:

Measure for Correct Length
Manifold:

Determined by application
Spark Plug:

14mm, ¾” reach
Head Torque:

See fastener manufacturers specs
Intake Valve:

Stainless 2.250"
Exhaust Valve:

Stainless 1.880"
Flat Milling:

.006” per cc
Valve Angles:

24° intake/15° exhaust
Chamber Size:

119cc


 

 

PRO ACTION ™ BIG BLOCK CHEVY - 360cc Runner
RHS™ Pro Action™ cylinder heads are the perfect bolt on head for larger displacement Big Block Chevy motors. Ideal for 454 cid and larger engines, Pro Action™  360cc cylinder heads are the hot ticket to making up to 1000+ flywheel horsepower in naturally aspirated trim. With superb finished quality and a long list of desirable standard features, Pro Action™  360cc cylinder heads deliver maximum value for your performance dollar.

Head Gasket:

Fel-Pro #1027
Intake Gasket:

Fel-Pro #1275

Exhaust Gasket:

Fel-Pro #1410
Head Studs:

ARP #235-4303
Rocker Arms:

COMP Cams® #1320-16
Lifters:

Determined by application
Pistons:

Determined by application
Pushrods:

Measure for Correct Length
Manifold:

Determined by application
Spark Plug:

14mm, ¾” reach
Head Torque:

See fastener manufacturers specs
Intake Valve:

Stainless 2.300"
Exhaust Valve:

Stainless 1.880"
Flat Milling:

.006” per cc
Valve Angles:

24° intake/15° exhaust
Chamber Size:

119cc


 

 

119cc Chamber
BIG BLOCK CHEVY: PRO 24°
STREET PERFORMANCE SERIOUS STREET / STRIP DRAG RACING/POWERBOAT
FINISH AS CAST AS CAST CNC CHAMBER
APPROX. HP 800-850 800-850 850-1000 to be announced
INTAKE VALVE
EXHAUST VALVE		 2.250” +.250”
1.880” +.100”		 2.250” +.250”
1.880” +.100”		 2.300” +.250”
1.880” +.100”		 2.250” +.250”
1.880” +.100”		 2.300” +.250”
1.880” +.100”
RUNNER SIZE 320cc 320cc 360cc 360cc 320cc 360cc
MATERIAL
 CAST IRON ALUMINUM CAST IRON ALUMINUM ALUMINUM ALUMINUM

BARE

 #11301
 #11001
 #11302
 #11002
 #11003
 #11004
FLAT TAPPET
HYDRAULIC ROLLER
Assembled in-house using quality COMP Cams™ components

#11301-02

#11001-02

#11302-02

#11002-02

#11003-02

#11004-02
SOLID ROLLER
Assembled in-house using quality COMP Cams™ components		 #11301-03

#11001-03

#11302-03

#11002-03

#11003-03

#11004-03
Assembled in-house using quality COMP Cams™ components = Assembled in-house using quality COMP Cams™ components

 
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Phone: (877)776-4323 • Fax: (901)368-1951