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World, Motown 220 Cast Iron Chev SB Head, Stage 3 Assm., Ea.
World Motown 220 Cast Iron Chev SB Head
Designed for use in racing applications where cast iron heads are mandated or for larger displacement small block street-type engines, World's 220cc intake Motown heads are the ULTIMATE cast iron SBC head. Employing RightCast ports, big 2.080" diameter intake valves and a highly efficient 64cc combustion chamber, providing significant power increases over other heads on the market. Ideally suited for Chevy SB engines of 383 or larger. Manley stainless steel valves, PC style seals, 1.550" (mechanical roller to .700" lift) valve springs, 10° chrome moly retainers and keepers. Factory assembled.