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Genuine Briggs & Stratton World Formula cylinder head assembly, part # 557133 . Used, all components are in good appearing condition.
Ships complete as shown including: Installed head plate, valves, valve guides, valve springs with retainer assemblies, rocker studs, rocker arms, rocker adjusters, pushrod guides, heat sink, intake studs and exhaust studs.
Does not include valve stem caps.
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