164Tooth Flywheel SFI 4.6L 8-Bolt Steel

The Ford 164 Tooth Flywheel SFI 4.6L 8-Bolt Steel (M-6375-G46A) is a precision-engineered engine component designed for 4.6L Ford Modular engines requiring internal balance and SFI certification. Built from billet steel, this 164-tooth flywheel delivers the reliability and durability demanded in high-performance and replacement applications where engine integrity cannot be compromised.

The 164-tooth design interfaces with standard Ford starter motors on 4.6L applications, while the internal balance specification ensures proper weight distribution across the crankshaft assembly. Internal balance is critical in modular engine builds—it reduces vibration, minimizes stress on main bearings, and promotes smoother power delivery across the entire RPM band. The SFI 1.1 certification indicates this flywheel meets the Specialty Equipment Market Association's safety standards for fastener retention and structural integrity, essential in high-stress environments or upgraded engine configurations. At 27.27 lbs, the component integrates seamlessly into stock and modified powerplants without requiring additional offsetting ballast.

This flywheel serves operators, mechanics, and enthusiasts rebuilding or upgrading 4.6L Ford Modular engines in platform vehicles where original equipment has worn or been damaged. Common applications include F-150, Expedition, Mustang, and other Ford platforms using the 4.6L architecture. Replacement scenarios range from routine engine service to performance restoration projects where worn flywheels introduce drivetrain slack or abnormal vibration. The billet steel construction provides superior fatigue resistance compared to cast iron alternatives, particularly in vehicles subjected to sustained high-load or high-RPM operation.

Buyers sourcing Ford flywheel replacements should verify that internal balance matches their engine's block and crankshaft configuration—mixing internal and external balance components compromises performance and longevity. The SFI certification ensures this component meets modern safety and reliability standards, making it suitable for both stock restoration and vetted performance builds. This unit arrives ready for immediate installation without additional machining or modification.