Ford Racing 5.0L Cast Iron Modular BOSS Cylinder Block


FR Engine Blocks

SKU: 8966


The Boss 5.0 block is a 4.6L deck height, 94mm cylinder bore cast iron block. The block uses a proprietary iron mix to yield the strongest possible casting strength with the least porosity and greatest consistency.

NOTE: The Boss 5.0L  modular block does not have a finish milled head deck surface and the cylinder bores are rough honed.

  • Siamese 94mm bore
  • 17mm main web minimal thickness
  • 4 Bolt main with interference fit nodular iron machined caps
  • Increased main web window size for improved crankcase breathing
  • Head gaskets for 3V applications use M-6067-3V50 for all others contact Cometic® Gasket
  • For installation in 2005-2010 Mustangs use engine mount adapter M-6031-BOSS50
  • Weighs approximately 165 lbs

Additional information

Weight 180 lbs
Dimensions 19 × 14.5 × 21 in


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