Ford Performance Boss Short Block Engine Assembly

Ford Performance Boss Short Block Engine Assemblies provide the ideal foundation for building a high-output small block Ford engine. Ford Performance engineers handle the most demanding part of the build — delivering a ready-to-finish short block assembled with premium, race-proven components and tight performance clearances.

Premium Internal Components:

• Ford Performance BOSS Iron Block — cast from diesel-grade iron with Siamese bores, thick cylinder walls and decks for strength far superior to any Ford production block
• Forged Steel Crankshaft — precision forged for strength and durability under high-horsepower conditions
• Forged H-Beam or I-Beam Connecting Rods — with floating piston pins and ARP hardware for reliable high-RPM operation
• Mahle Forged Aluminum Pistons — engineered for performance applications with proper valve reliefs for compatibility with a wide range of cylinder heads
• Clevite Main and Rod Bearings — precision-fit for performance clearances
• Splayed 4-Bolt Main Caps — for maximum bottom-end rigidity under high loads

Engineering & Assembly:

• Hand assembled in the USA with performance clearances — not mass-produced on an assembly line
• Built with all-new parts throughout
• Internally balanced for smooth, reliable operation
• Compatible with stock-type timing covers and standard Windsor oil pan flanges
• NASCAR-inspired front oil feed on both lifter galleys
• Optimized cylinder wall length for stroker applications with no grinding or clearancing required
• Machined to accept factory roller lifter guides and retainers

Flexibility to Build Your Way:

• Add your choice of cylinder heads, camshaft, intake manifold, and oil pan to suit your power goals
• Compatible with a wide range of performance aftermarket cylinder heads
• Available in multiple displacements to match your build requirements

Each Ford Performance Boss Short Block has been proven on tracks around the world and in hundreds of street and competition builds. Whether you're building a dedicated race engine or a high-powered street machine, the Boss Short Block delivers the structural integrity and precision assembly needed to support serious power.

WARNING: Certain configurations of this product are designed and intended for competition use only and may not be legal for use on public roads and highways. Check your specific part number for emissions and street-use compliance details.