Duromax 500 / Rato R500-V Parts are available at BigBlockClones.com Think "son of GX390" with extra beefy castings that support a 94mm bore and a 72mm stroke right out of the box. Thicker and heavier in every dimension, this engine has TONS of potential with a great cylinder head that rocks a 40mm intake valve! https://bigblockclones.com/collections/rato-r500-v | Big Block Clones
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Duromax 500 / Rato R500-V Parts are available at BigBlockClones.com Think "son of GX390" with extra beefy castings that support a 94mm bore and a 72mm stroke right out of the box. Thicker and heavier in every dimension, this engine has TONS of potential with a great cylinder head that rocks a 40mm intake valve! https://bigblockclones.com/collections/rato-r500-v | Big Block Clones
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