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Pro Action 360X
Cast Iron Cylinder Heads - Bare & Assembled

RHS® and Indy Cylinder Heads teamed up to give Mopar enthusiasts the performance cast iron head they deserve. 20% More Flow!!!


A replacement for small block LA and Magnum applications, the Pro Action™ 360 X Cylinder Heads feature a host of improvements over the factory originals and are an easy ticket to making 400 to 550 horsepower.

The Pro Action™ 360 X is divided into two sub-series – the LA-X and the MA-X:

The LA-X head uses the standard Chrysler LA intake manifold and rocker shaft, is drilled for the proper valve cover and gasket and contains both LA and Magnum accessory holes on both ends of the head.

Designed for use with the Magnum intake manifold, rocker arms, gaskets and valve covers, the MA-X head features a pedestal large enough to enable 7/16"-14 drilling and tapping for stud-mounted rocker arms and guide plates.
  • Cast iron replacement head designed for use with street/strip small
    block Chrysler LA & Magnum engines
  • 179cc intake & 62cc exhaust runners with a 62cc combustion chamber
  • Hardened multi-angle intake (1.920") & radiused exhaust (1.625")
    valve seats for up to 5% more flow out of the box
  • Dual pattern exhaust bolts (standard & W2)
  • Extra thick deck faces to allow angle milling
  • Revised water jacket design for cooler, more efficient engine operations
  • (all bare heads, valves and guides finished, just check for concentricity)
     

Order online below or
call us at (603) 378-0090

SB CHRYSLER 318-450 - PRO ACTION™ 360 X CYLINDER HEADS, CAST IRON
Part # Description Runners Chamb. Spark Plugs IN
Valve
EXH
Valve
Notes Price/
Each
Order
Online
20300 MA-X
SB Chrysler Magnum
318-415 c.i.
BARE
179cc 62cc Angle 1.920" x 5/16" 1.625" x 5/16" can NOT use
double springs
$319 order here

20301-X LA-X
SB Chrysler LA
318-415 c.i.
Big Valve Head
BARE
179cc 62cc Angle 2.055"
x 11/32"
1.625" x 11/32 machined for
double springs
$525 order here
20301-X1 LA-X
SB Chrysler LA
318-415 c.i.
Big Valve Head
ASSEMBLED
w/Hyd. Cam
179cc 62cc Angle 2.055"
x 11/32"
1.625" x 11/32 Includes:
-CompCams double
 springs (550 max lift)
-Manley Race flow valves
-Chrome moly retainers
-Vicon seals
$769 order here
20301-X2 LA-X
SB Chrysler LA
318-415 c.i.
Big Valve Head
ASSEMBLED
w/Mech. or
Hyd. Roller Cam
179cc 62cc Angle 2.055"
x 11/32"
1.625" x 11/32 Includes:
-CompCams double
 springs (550 max lift)
-Manley Race flow valves
-Chrome moly retainers
-Vicon seals
$789 order here
* Stock Valve Length
 
 
 
 
 
 
 
 
 
 
 
 

Sales/Tech Line: (603) 378-0090
Email: tech@flatlanderracing.com


Thank You for visiting Flatlander Racing
*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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