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![Cast Iron Severe-Duty Engine Block [Ford 351W Windsor]](https://www.jegs.com/images/mini_750/700/746/746-pce286.1015.jpg)
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- Cast Iron Engine Block
- Ford 351W Windsor
- 9.500 in. Deck Height
- 4 in. Cylinder Bore Diameter
- Main Bearing Bore: Standard 351C
- 1-Piece Rear Main Seal
- 4-Bolt Billet Steel Main Caps
- Max Bore & Stroke: 4.185 in. x 4.125 in.
Build your dream engine The next level of performance is these cast iron Ford small blocks. Designed to look standard under your bonnet, and work with stock components. Block is ready for the street racer or all out racer with added strength and cubic inches.All the factory flaws redesigned to eliminate all problems, still using water jacket design.Blocks are cast from highest quality high-density iron with extra-thick cylinder walls and decks.The blocks webs are stronger and fitted with billet steel 4-bolt main caps.Ideal for for supercharged, turbocharged and nitrous applications! Features Include: Extra thick cylinder walls & decks, 4 bolt splayed mains, enlarged bosses for offset or oversize lifters;and scalloped water jacket holes for improved cooling. Used in 1500+HP Applications!
Superior Engine Block Construction
Speedmaster Aluminum and Cast Iron Engine Blocks are ideal for street or all-out racing use and styled with an OEM look that works with stock components. With the original water jacket design in place, Speedmaster re-engineered the blocks with extra-thick cylinder walls and decks, super-strong webs, and billet steel 4-bolt main caps to eliminate common factory flaws. Each high-density engine block has enlarged bosses for offset or oversize lifters and is well suited for any 1500+ HP supercharged, turbocharged, or nitrous application.
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Build stronger, lighter, and more dependable power with Speedmaster Engine Blocks—meticulously engineered for high-performance applications. Machined from high-strength aluminum alloy, these blocks offer significant weight savings over traditional cast iron while delivering the structural integrity needed for serious horsepower and torque builds.
For Chevy enthusiasts, the speedmaster sbc block provides a robust foundation featuring four-bolt billet main caps, standard deck height, and options for both 4.000" and 4.125" bores—perfect for maximizing versatility and durability in small-block Chevy projects.
Beyond Chevy, the speedmaster engine blocks line includes Ford and LS options. Each variant is prepared for high-performance use, with billet main caps designed to support elevated power levels and withstand demanding conditions.
These speedmaster engine blocks are not only engineered for strength but also refined for practicality. The precision pre-machining makes them ready to accept off-the-shelf components like camshafts, oil pumps, timing chains, motor mounts, and more—eliminating costly blueprinting or modifications.
Whether you’re chasing peak performance or dependability, choosing a speedmaster block ensures you’re building on a platform engineered for endurance, precision, and adaptability. Ideal for street/strip performance, race builds, or high-output restorations, these blocks offer exceptional value and power potential in one sophisticated package.
