SBF Alm SFI Flywheel 157-Tooth Int Balance

The CENTERFORCE SBF Alm SFI Flywheel 157-Tooth Internal Balance (part number 901157) is a premium aluminum flywheel engineered specifically for Small Block Ford engines. This internally balanced unit combines SFI 1.1 certification with a replaceable friction surface, delivering the durability and performance characteristics demanded by high-revving street and competition applications where reliability under sustained load is non-negotiable.

Weighing 14.95 lbs and featuring 157 teeth for standard starter compatibility, this flywheel is engineered with internal balance weight accommodation built into its design. The aluminum construction reduces rotating mass compared to traditional steel flywheels, which improves throttle response and allows the engine to reach peak RPM more quickly—a critical advantage in both drag racing and street performance scenarios. The SFI 1.1 certification ensures it meets safety standards for high-performance use, including protection against catastrophic failure should the friction surface separate. The replaceable surface design extends service life by allowing friction material renewal without replacing the entire flywheel assembly, reducing long-term ownership costs in heavy-use environments.

This flywheel is purpose-built for Small Block Ford builders who demand factory fitment reliability paired with performance upgrades. Whether upgrading from an original equipment flywheel or replacing a worn unit in an existing build, the 157-tooth count maintains starter ring compatibility while the internal balance system eliminates the need for external weight additions, streamlining installation. The combination of lightweight aluminum construction and SFI certification makes this a practical choice for engine builders balancing performance gains with safety and longevity requirements.