Ford Racing 5.0L Cast Iron Modular BOSS Cylinder Block

• 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