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Direct fit with larger pistons in 1996-2004, 05-10 Mustangs will require engine mount adapters
This Ford Racing Boss Modular 5.0L Engine Block is designed to be direct fit replacement for the stock 4.6L block of the 1996 to 2004 GT Mustang. 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. This block reuses everything from your stock GT's 4.6L V8, all you need to supply is a new set of larger pistons and brand new 5.0 is complete.
- 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
NOTE: The Boss 5.0L modular block does not have a finish milled head deck surface and the cylinder bores are rough honed.