MAN Forged Crankshafts

Pro Series 4340 Alloy Steel Crankshaft — High-Performance Domestic / Corvette Applications

Unleash serious strength and precision with our Pro Series 4340 alloy steel crankshaft, engineered for high-performance domestic engines — including modern Corvette LS / LT platforms. Built with race-reliable features and backed by rigorous quality control, this crank is designed to push horsepower limits while maintaining smooth operation.

Key Features & Benefits

• Lightweight & Strong 4340 Construction
   Offered in either non-twist forged 4340 or “Turbo-Tuff” 4340 billet variants, delivering outstanding durability and torsional stiffness.

• Gun-Drilled Mains & Lightened Rod Journals
   Precision removal of excess material reduces rotating mass while maintaining structural integrity — improving throttle response and reducing inertia.

• Fully Profiled Counterweights
   Each counterweight is carefully machined to precise contours for optimal balance and reduced vibration.

• Multi-Step Heat Treatment & Nitriding
   Advanced thermal processes and surface hardening improve fatigue resistance, toughness, and longevity under extreme loads.

• Micro-Polished Large-Radius Journals
   Journals are polished to minimize friction, reduce wear, and support high RPM stability.

• Comprehensive Quality Assurance
   Each crankshaft goes through stress relief, shot peening, and 100% magnaflux inspection to ensure there are no hidden defects.