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Scat F-43 Series Forged Crankshaft - 4.000 in Stroke - Internal Balance - 2-Piece Seal - Small Block Chevy 4-400-4000-6000-21LW 9210D In order to properly installProduct Description: Crankshaft F 43 Series 4. 000 in Stroke Internal Balance Forged Steel 2 Piece Seal Small Block Chevy Sold Individually Scat started out as a shop specializing in high performance VW air cooled engines and later branched out into offering crankshafts for larger V8 engines. Today, they maintain three separate divisions: Scat Crankshafts, Procar (custom seats and accessories), and Scat Volkswagen Performance. For over 45 years Scat