Competition BBC 454 Semi-Finished MB 2-Pc
Competition BBC 454 Semi-Finished MB 2-Pc


Competition BBC 454 Semi-Finished MB 2-Pc

 $1,099.99 

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Specification Overview

Sportsman Series
BBC 454: Semi Finished Machined Block
4.275, 4.285, 4.305 Bore; 454 Mains, 2-Piece Rear Main Seal
(.005" Available For Finish Honing)

  • Seasoned GM production, Mark IV (non-roller), 2-bolt block (converted to 4-bolt mains)
  • Block is oven baked and shot peened to settle molecular structure    
  • Magnafluxed for cracks and clearanced for strokers. Additional clearancing may be necessary depending upon your rod and stroke combination  
  • Block is precision machined on our 4-axis CNC equipment
  • Cylinders require finish honing as needed
  • Mains are line bored on our Winona Van Norman line boring equipment
  • Mains are finish honed on Sunnen CH100 Line Hone
  • Block is converted to 4-bolt billet mains (center 3 only) using ARP main studs
  • Block ships with a machined block kit including: Cam Bearings, Freeze Plug Package, and Alignment Dowel Package
  • Block is assembled with a 2-piece rear main seal for 2-piece crankshaft applications
    • Comes with billet caps (center 3 only, converted to 4-bolt mains) and ARP main studs.
    • Oven baked and shot peened to settle molecular structure