B340 is a component of the World Products brand of race engine parts. It is a short-block rotating assembly, which includes a variety of parts that are used to assemble a high-performance engine. This kit contains a 4.125” stroke crankshaft, forged steel H-beam connecting rods, choice of pistons, and a high-velocity camshaft. The B340 short-block is designed specifically to maximize performance in Race Applications, and offers increased longevity through increased bearing clearances, and a choice of championship-winning components.