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DM17-S-T Single-Cylinder Engine Assembly Kit 130PCS is a 130-piece metal single-cylinder assembly driven by an electric motor and rechargeable battery..

TECHING DM13-B Inline-4 Engine Assembly Kit 325PCS is a new-kit metal inline-four assembly that runs slowly from a rechargeable battery so piston, cra..

TECHING Upgraded L4 Full-Metal Inline-4 Engine Model Kit is a 364-plus-piece motorized inline-four assembly model that exposes crankshaft, piston, val..