• CNC-machined cast-iron competition block

• +/-0.005" machining tolerances

• 4-bolt nodular mains, splayed caps on center three mains

• 4.117" finished bore

• 4.155" max bore (siamesed cylinder bores)

• Tall lifter bores

• Comes with rear seal adapter

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350 Main, 400 Bore Size Bowtie Sportsman Block, 1-Piece Rear Main Seal

  • $2,815.36