Pro Comp 4340 Forged Steel Crankshaft, 4.000" Stroke

The Scat 4-400-4000-6000-2-20 Pro Comp Lightweight crankshaft is engineered for Small Block Chevy applications, offering a significant upgrade in performance and durability. Constructed from robust aircraft-quality 4340 forged steel, this crankshaft features a 4.000-inch stroke and is designed for internal balance, tipping the scales at approximately 50 lbs. Its specifications include 2.649-inch main journals (compatible with 400 main configurations) and 2.000-inch rod journals, accommodating 6.000-inch or longer connecting rods, and a 2-piece rear main seal. This Pro Comp Lightweight series crankshaft is distinguished by its profiled aero-wing counterweights, which reduce overall weight and contribute to quicker engine acceleration and higher RPM potential. Scat has incorporated enhancements such as straight shot and chamfered oil holes to ensure optimal lubrication. The nitride-hardening process provides superior wear resistance, while the lightening holes in all rod throws further decrease rotational mass. Precision CNC machining guarantees absolute tolerances and symmetry, simplifying the balancing process and contributing to a smoother-running, more efficient engine build. This crankshaft is ideal for performance engine builds where reduced rotating weight and increased responsiveness are desired. Its robust construction and advanced features make it a reliable component for high-performance applications. The use of 4340 forged steel ensures it can withstand the demands of powerful engines.