Cylinder head uses modern technology to offer more horsepower and improved efficiency while remaining cost effective. Iron head include as-cast ports and combustion chambers, raised intake runners, phosphorous-bronze valve guides, extra thick decks, angle plugs and three angle valve job. head are offered in 200cc, 220cc and 235cc intake runner versions. Sold individually as bare castings.Pit Stop USA offers EngineQuest Performance Cast Iron Cylinder Head - Bare - SB Chevy 350-383 C.I. - Intake Runner: 200cc, Combustion Chamber: 50cc, Intake/Exhaust Valve: 2.02", 1.60" - Angle Plug CC200AA at low everyday prices. Be sure to check out all of our products from EngineQuest including EngineQuest Cast Iron Heads - Small Block Chevy.