4.000" Stroke Stroker Kit for Ford 351W with 6.250" H-Beam

The Eagle Specialty Products ESP-14125 is a competition stroker kit designed to transform a Ford 351W engine into a 408 cubic inch powerhouse. This kit features a robust Eagle 4340 forged steel crankshaft with a 4.000-inch stroke, paired with Mahle 4032 forged flat-top pistons that offer a -6.6cc dome volume. The connecting rods are Eagle 4340 steel H-beams, measuring 6.250 inches in length and equipped with 7/16-inch ARP 8740 rod bolts. This assembly is suitable for builds up to 800 horsepower, with potential to exceed 1000 horsepower with upgraded rod bolts. The kit includes a Mahle performance piston ring set and performance H series race rod and main bearings. It is supplied unbalanced, requiring internal balancing before installation; an internally balanced kit is available under part number B14125. The kit is compatible with 1-piece or 2-piece rear main seals and utilizes *3.000 Windsor Mains*. With 58cc cylinder heads, the compression ratio is 12.6:1, and with 64cc heads, it is 11.7:1. It is important to note that the standard Ford 351w engine block has a 4.000-inch bore and a 9.500-inch deck height. Bore sizes of 4.125 or 4.155 inches will require the use of an aftermarket block.