HOWARDS CAMS Billet Reaper E4340 Billet Steel Crankshaft for Big Block Chevy Mark IV Engines

Billet Reaper Billet Steel Crankshaft

• Chevy Big Block Mark IV Engines 396–502

• 454 Main Journal

• 4.500 in. Stroke

• 2.200 in. Rod Journal

• 6.535 in. Rod Length

• 2-Piece Rear Main Seal

• Internal Balance
  
  

  The Howards Cams 45445006535 Billet Reaper Crankshaft is engineered for high-horsepower Chevy Big Block Mark IV engines requiring maximum strength, durability, and precision. Manufactured from premium E4340 billet steel, this crankshaft is CNC-machined for exacting tolerances and designed to withstand extreme cylinder pressures in serious street, strip, and competition engine builds.

  Howards Cams 45445006535 Features:

  • Billet Reaper crankshaft manufactured from E4340 aircraft-quality billet steel

  • CNC-machined for precise journal sizing and consistent balance

  • 454 main journal configuration for Chevy Big Block Mark IV engines

  • 4.500 in. stroke for high-displacement performance builds

  • 2.200 in. rod journal diameter

  • Designed for use with 6.535 in. connecting rods

  • 2-piece rear main seal design

  • Center counterweight and full counterweight configuration for improved balance

  • Deep-nitride hardened journals for superior wear resistance

  • Fully stress-relieved and shot-peened for long-term durability

  • Large fillet radii on all bearing journals for increased strength

  • Lightening holes in all rod throws to reduce rotating mass

  Howards Cams 45445006535 Notes:

  • Designed for Chevy Big Block Mark IV engines from 396–502 ci

  • Internally balanced crankshaft

  • Professional engine balancing recommended prior to installation

  • Intended for high-performance and competition engine applications