Eagle Ford 351W 4.000in Crank 6.200in I-Beam Rods -27.5cc 4.040in Pistons Rotating Assembly

This Eagle Pro Street Rotating Assembly gives you the core components to rebuild or upgrade your Ford 351W engine. You get a forged 4.000-inch stroke crankshaft made from 4340 steel, paired with 6.200-inch long I-beam connecting rods also constructed from 4340 steel. These rods are secured with 7/16-inch ARP 8740 bolts, known for their strength and reliability in performance applications. The assembly also includes hypereutectic KB pistons with an inverted dome design, measuring 4.040 inches in bore size and featuring a -27.5cc volume. Plasma-moly file-fit piston rings are included, allowing for precise gap setting during installation. Finally, King XP series rod and main bearings are part of this package, offering robust performance for your engine build.

This rotating assembly is specifically built for naturally-aspirated racing use, meaning it's designed to handle the demands of high-RPM operation without forced induction. The use of 4340 forged steel for both the crankshaft and connecting rods signifies a strong foundation for a performance engine, offering improved durability over cast components. The included ARP bolts are a notable upgrade, providing superior clamping force and reliability compared to standard fasteners. The file-fit piston rings are a key detail for engine builders, as they allow for custom ring gap adjustments tailored to your specific engine build and intended use, which is crucial for optimal performance and sealing in a racing environment.

When planning your engine build with this rotating assembly, remember that it is not CARB approved and cannot be shipped to California. Proper installation and balancing by a qualified professional are highly recommended to ensure the longevity and performance of your engine. This assembly is a solid choice for those looking to build a powerful, naturally-aspirated racing engine for their Ford 351W.