Includes 4340 billet crank, 101mm stroke, I-beam Pro rods (6.050 c-to-c), and custom pistons (choice of bore/compression). ACL Race bearings available separately.
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4G64 block/4G63 head 2.50L - Includes 4340 billet crank (7 bolt), 102mm stroke, Pro Series rods (6.141 c-to-c), and custom pistons (choice of bore/compression). ACL Race bearings available separately.