| RHS® and Indy Cylinder Heads teamed up to give Mopar enthusiasts the
performance cast iron head they deserve. 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 |
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