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(larger view)		   RHS Cylinder Heads
Pro Action 23°
Cast Iron and Aluminum Cylinder Heads

These heads deliver significant gains in both power and torque for all Small Block Chevrolet applications – right out of the box!

Available in aluminum or cast iron, 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.

  • 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
  • Select from 180cc, 200cc, 220cc & 235cc intake runner volumes with 50cc, 64cc or 72cc combustion chambers
  • Available in aluminum or cast iron; as cast or fully assembled with premium COMP Cams® valve train components
  • (all bare heads, valves and guides finished, just check for concentricity)

All these cylinder heads are available with larger valves and springs upon request. Please call.

Order online below or
call us at (603) 378-0090
Part # Material Int.
Runners		 Chamb. Spark
Plugs		 IN
Valve		 EXH
Valve		 Valve
Train		 Max
Lift		 Price/
Each		 Order
Online
SMALL BLOCK CHEVY - PRO ACTION 23° CYLINDER HEADS, CAST IRON
12317-01 Cast Iron 180cc 64cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12317-02 Cast Iron 180cc 64cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12318-01 Cast Iron 180cc 64cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12318-02 Cast Iron 180cc 64cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12301-01 Cast Iron 180cc 72cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12301-02 Cast Iron 180cc 72cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12302-01 Cast Iron 180cc 72cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12302-02 Cast Iron 180cc 72cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12333-01 Cast Iron 200cc 50cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12333-02 Cast Iron 200cc 50cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12334-01 Cast Iron 200cc 50cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12334-02 Cast Iron 200cc 50cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12319-01 Cast Iron 200cc 64cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12319-02 Cast Iron 200cc 64cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12320-01 Cast Iron 200cc 64cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12320-02 Cast Iron 200cc 64cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12303-01 Cast Iron 200cc 72cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12303-02 Cast Iron 200cc 72cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12304-01 Cast Iron 200cc 72cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12304-02 Cast Iron 200cc 72cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12335-01 Cast Iron 220cc 50cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12335-02 Cast Iron 220cc 50cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12336-01 Cast Iron 220cc 50cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12336-02 Cast Iron 220cc 50cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12321-01 Cast Iron 220cc 64cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12321-02 Cast Iron 220cc 64cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12322-01 Cast Iron 220cc 64cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12322-02 Cast Iron 220cc 64cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12305-01 Cast Iron 220cc 72cc Straight 2.020" 1.600" Flat Tappet .560" $485 order here
12305-02 Cast Iron 220cc 72cc Straight 2.020" 1.600" Hyd. Roller .600" $534 order here
12306-01 Cast Iron 220cc 72cc Angle 2.020" 1.600" Flat Tappet .560" $485 order here
12306-02 Cast Iron 220cc 72cc Angle 2.020" 1.600" Hyd. Roller .600" $534 order here
12323-01 Cast Iron 235cc 64cc Straight 2.080" 1.600" Flat Tappet .560" $485 order here
12323-02 Cast Iron 235cc 64cc Straight 2.080" 1.600" Hyd. Roller .600" $534 order here
12324-01 Cast Iron 235cc 64cc Angle 2.080" 1.600" Flat Tappet .560" $485 order here
12324-02 Cast Iron 235cc 64cc Angle 2.080" 1.600" Hyd. Roller .600" $534 order here
12307-01 Cast Iron 235cc 72cc Straight 2.080" 1.600" Flat Tappet .560" $485 order here
12307-02 Cast Iron 235cc 72cc Straight 2.080" 1.600" Hyd. Roller .600" $534 order here
12308-01 Cast Iron 235cc 72cc Angle 2.080" 1.600" Flat Tappet .560" $485 order here
12308-02 Cast Iron 235cc 72cc Angle 2.080" 1.600" Hyd. Roller .600" $534 order here
SMALL BLOCK CHEVY - PRO ACTION 23° CYLINDER HEADS, ALUMINUM
12052-01 Aluminum 180cc 64cc Straight 2.020" 1.600" Flat Tappet .560" $609 order here
12052-02 Aluminum 180cc 64cc Straight 2.020" 1.600" Hyd. Roller .600" $655 order here
12053-01 Aluminum 180cc 64cc Angle 2.020" 1.600" Flat Tappet .560" $609 order here
12053-02 Aluminum 180cc 64cc Angle 2.020" 1.600" Hyd. Roller .600" $655 order here
12041-01 Aluminum 180cc 72cc Straight 2.020" 1.600" Flat Tappet .560" $609 order here
12041-02 Aluminum 180cc 72cc Straight 2.020" 1.600" Hyd. Roller .600" $655 order here
12042-01 Aluminum 180cc 72cc Angle 2.020" 1.600" Flat Tappet .560" $609 order here
12042-02 Aluminum 180cc 72cc Angle 2.020" 1.600" Hyd. Roller .600" $655 order here
12054-01 Aluminum 200cc 64cc Straight 2.020" 1.600" Flat Tappet .560" $609 order here
12054-02 Aluminum 200cc 64cc Straight 2.020" 1.600" Hyd. Roller .600" $655 order here
12055-01 Aluminum 200cc 64cc Angle 2.020" 1.600" Flat Tappet .560" $609 order here
12055-02 Aluminum 200cc 64cc Angle 2.020" 1.600" Hyd. Roller .600" $655 order here
12043-01 Aluminum 200cc 72cc Straight 2.020" 1.600" Flat Tappet .560" $609 order here
12043-02 Aluminum 200cc 72cc Straight 2.020" 1.600" Hyd. Roller .600" $655 order here
12044-01 Aluminum 200cc 72cc Angle 2.020" 1.600" Flat Tappet .560" $609 order here
12044-02 Aluminum 200cc 72cc Angle 2.020" 1.600" Hyd. Roller .600" $655 order here
12056-01 Aluminum 220cc 64cc Straight 2.020" 1.600" Flat Tappet .560" $609 order here
12056-02 Aluminum 220cc 64cc Straight 2.020" 1.600" Hyd. Roller .600" $655 order here
12059-01 Aluminum 220cc 64cc Angle 2.020" 1.600" Flat Tappet .560" $609 order here
12059-02 Aluminum 220cc 64cc Angle 2.020" 1.600" Hyd. Roller .600" $655 order here
12045-01 Aluminum 220cc 72cc Straight 2.020" 1.600" Flat Tappet .560" $609 order here
12045-02 Aluminum 220cc 72cc Straight 2.020" 1.600" Hyd. Roller .600" $655 order here
12046-01 Aluminum 220cc 72cc Angle 2.020" 1.600" Flat Tappet .560" $609 order here
12046-02 Aluminum 220cc 72cc Angle 2.020" 1.600" Hyd. Roller .600" $655 order here
12060-01 Aluminum 235cc 64cc Straight 2.080" 1.600" Flat Tappet .560" $609 order here
12060-02 Aluminum 235cc 64cc Straight 2.080" 1.600" Hyd. Roller .600" $655 order here
12062-01 Aluminum 235cc 64cc Angle 2.080" 1.600" Flat Tappet .560" $609 order here
12062-02 Aluminum 235cc 64cc Angle 2.080" 1.600" Hyd. Roller .600" $655 order here
12047-01 Aluminum 235cc 72cc Straight 2.080" 1.600" Flat Tappet .560" $609 order here
12047-02 Aluminum 235cc 72cc Straight 2.080" 1.600" Hyd. Roller .600" $655 order here
12048-01 Aluminum 235cc 72cc Angle 2.080" 1.600" Flat Tappet .560" $609 order here
12048-02 Aluminum 235cc 72cc Angle 2.080" 1.600" Hyd. Roller .600" $655 order here
* .100” Long Valve Length
 
 
 
 
 
 
 
 
 
 
 
 
Sales/Tech Line: (603) 378-0090
Email: tech@flatlanderracing.com

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*All prices on this site are subject to change without notice. Flatlander Racing™ disclaims responsibility for any printing or typographical errors, and does not guarantee that all information is accurate.

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