LS - Gen III/IV Rotating Assembly Kit - 427 Cubic Inch- Wet Sump

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  • Regular price $2,599.00
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Factory Mast Premium Rotating Assembly Kit.

For use with Gen III/IV RESLEEVE Aluminum LS blocks - LSX Iron or Outlaw

Looking for a premium product that supports high horsepower without sacrificing longevity and your wallet?  Take all of the guess work out with our Factory Mast Premium Rotating Assemblies.  Packaged with all the components you need to complete your Build, when choosing the Factory Mast Standard or Re-Sleeved Blocks.

100% made in USA - No Compromises

Kit includes:

  • Forged & REM Isotropic Polished GM Factory L8T Crank
  • Main & Rod Journal Reground to Performance Tolerances
  • Center Counterweight
  • New Welded 58X Reluctor Wheel
  • Forged Callies 6.125 Rod
  • Factory Mast Pistons by Wiseco.
  • Piston Rings
  • Main Bearings
  • Rod Bearings
  • Assembly Lube

** Must use 8 Bolt Flywheel or Flexplate


  • Displacement: 427 Cubic Inches
  • Bore Size: 4.175"
  • Rod Length: 6.125"
  • Rod Type: Callies Forged Rod ARP Bolts
  • Stroke: 3.900"
  • Wet Sump
  • Naturally Aspirated