# 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. WARNING: This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this art on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions.

-   For Install In 05-10 Mustangs Use Mount Adapter M-6031-BOSS50

## Details

- **Price:** 3373.4 CAD
- **Vendor:** Ford Racing
- **Type:** Engines

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3373.40 CAD | In stock |

## Images

- Photo - Primary
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- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/ford-racing-5-0l-cast-iron-modular-boss-cylinder-block)
> Updated: 2026-08-29