Eagle Ford 351W 4.000in Crank 6.250in I-Beam Rods -20cc Inv Dome 4.040in Pistons Balanced Assembly

If you're building a Ford 351W for serious naturally-aspirated racing, a balanced rotating assembly like this one from Eagle is a smart way to start. This kit bundles together all the core rotating components, precisely balanced to ensure smooth operation and durability under high RPMs. It's designed to handle the demands of performance builds where every part needs to work together seamlessly.

This assembly features a forged 4340 steel crankshaft with a 4.000-inch stroke, paired with 6.250-inch I-beam connecting rods. These rods are secured with 7/16-inch ARP 8740 bolts, known for their strength and reliability in performance applications. The pistons are forged 4032 aluminum from Mahle, featuring a -20cc inverted dome design and a 4.040-inch bore size, which is common for many 351W builds. The kit also includes plasma-moly file-fit piston rings, allowing for precise gap setting to match your specific engine build, and King XP rod and main bearings to ensure proper lubrication and wear resistance.

Having the rotating assembly professionally balanced before installation is a critical step for any performance engine. This kit comes balanced from Eagle, saving you time and ensuring the critical mass of the crankshaft, connecting rods, and pistons are all working in harmony. This reduces vibration and stress on your engine block and other components, contributing to a longer engine life and more consistent power delivery. Please note that this assembly is not CARB approved and cannot be shipped to California.