Rato R500D Cylinder Head Bare Casting - Fits GX390/420/440/460/500cc Engines
$129.95
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Rato R500D Cylinder Head Bare Casting - Fits GX390/420/440/460/500cc Engines Does not fit R500-V (Duromax 500) Includes steel seats and guides Uses 5.5mm stem valves and shaft mount rockers Has GX390 style 53mm intake flange stud pattern Hemispherical chamber
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