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
We offer free shipping within the US on all products up to 150lbs. All orders are processed within 2-3 business days.
We currently do not ship to P.O. boxes OR outside of the U.S.
Product Availability: Due to the COVID-19 pandemic, several products are on backorder or delayed. You can still order these products. We will ship them as soon as they become available (see product availability date in the description).
Please reach out to us if you have an issue. We are happy to work with you in order to solve the problem. Our customer service team typically responds within 3 hours.
We require a 15% restock fee for returns and the customer is responsible for shipping costs associated with the return.
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