Ford Racing 5.0L Cast Iron Modular BOSS Cylinder Block

Starting with a 94mm cylinder bore and a 4.6-liter deck height, this Ford Racing BOSS 5.0L cast iron modular engine block is built for serious performance. It uses a proprietary iron mix, carefully chosen to create the strongest possible casting with minimal porosity and consistent results. This means you get a solid foundation for your high-performance engine build, ready to handle the demands of competition use.

This block is designed specifically for competition use and is not street-legal. The cylinder bores come rough honed, and the head deck surface is not finish milled, so you'll need to account for these steps in your build process. It features a 4-bolt main design for added strength and rigidity, crucial for keeping everything in place under extreme stress. If you're working on an 05-10 Mustang, you'll need the M-6031-BOSS50 mount adapter to make it fit.

Remember, this block is intended for off-road competition vehicles only and should not be installed on any vehicle driven on public roads or highways, as this will likely violate emissions laws. It's also not CARB approved and cannot be shipped to California.