Eagle 4340 Forged BBF 460 4.500 Stroke Crankshaft 446045002200

Eagle 4340 Forged 429/460 Big Block Ford Crankshafts with 4.500 Stroke are internally balanced, They are our top-of-the-line competition crankshaft. Forged from ASME-certified 4340 steel in a non-twist forging, these cranks undergo X-Ray inspection, magnafluxing, and sonic testing to ensure quality. Journals are ground to exact specs and polished with our unique QPAC micro polishing system to achieve a roughness average of less than 2 RA. Target bobweight is held to within 2% of the specification to help eliminate guesswork when balancing.

All Eagle forged 4340 steel cranks are designed for internal balance without the need for heavy metal unless your bobweight is higher than the design target bobweight of the crank. Each crank is nitrided for superior hardness and wear protection. .125″ fillet radiuses are used on each journal for increased rigidity and strength. For this reason, chamfered or narrowed bearings must be used. Eagle forged 4340 cranks are intended for the most severe competition engines including nitrous, forced induction, and exotic fuels.

• Uses Traditional Long Post Crank Snout
• 2 Piece Rear Main Seal
• Requires Narrow Bearings
• Forged 4340 steel
• Internal Balanced
• Target bobweight: 2350g
• 4.500″ Stroke
• 2.2″ Rod Journals
• 2.000″ Rod Journal Width
• 3.000″ Main Journals
• 6.700″ Min. Rod Length
• Approx 77 lbs
• 3.141″ Rear Seal Dia.
• 1.373″ Snout Diameter
• 6 Flywheel Bolt Holes