Cylinder Head - 18-4504 - Sierra

Cylinder Head - 18-4504 - Sierra
Your Price: $2819.54
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Part # 18-4504
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This item is found in the following Product Families
Chris-Craft Head Gaskets
    Mercruiser Cylinder Head Assemblies
      Cylinder head assemblies from Sierra for Mercruiser Engines.
      • Aluminum cylinder heads sold in pairs only or 454 & 502 cu.In big-block GM applications.
      • Custom engraved with Sierra High-Performance logo
      • 320 cc intake runner/119cc exhaust runner
      • 2.25 intake/1.88 exhaust stainless steel valves
      • 5 angle valve seat cut
      • Up to 65HP increase over OE cylinder heads
      • Suitable for use on Mark IV, Gen V, & Gen VI GM blocks. Must use correct corresponding head gaskets
      • Std. BBC 7/16" rocker studs and 3/8" diameter pushrod guideplates
      • Rectangle intake ports
      • Use on factory non-adjustable valvetrain applications require adjustable rocker arm assemblies such as Sierra's 18-4507
      • Use Sierra 18-4506 guide plates to utilize factory 5/16" pushrods
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