Damper - SBF 289-351W 28oz External Balance

The Damper - SBF 289-351W 28oz External Balance by TRICK FLOW is a precision harmonic balancer engineered for small-block Ford engines running carbureted or early fuel-injected power plants. This external balance damper is built specifically for 289 and 351W engines, addressing the critical need to absorb crankshaft harmonics that can cause premature bearing wear, timing chain failure, and overall drivetrain instability. Whether you're restoring a classic muscle car, building a street engine, or creating a high-revving competition platform, controlling vibration is non-negotiable for longevity and reliability.

Trick Flow engineered this damper with a 28-ounce external balance specification, meaning the counterweight is positioned on the outer diameter of the assembly rather than integrated into the crankshaft itself. This design is essential for stock or modified 289-351W blocks that were originally calibrated to external balance configuration—mismatching balance types introduces severe vibration and can damage the crankshaft. The damper features a robust elastomer core that absorbs resonant vibrations across the RPM range, protecting your connecting rods, main bearings, and fasteners from fatigue failure. Its compact footprint and proven Trick Flow quality ensure OEM-level fitment and performance without requiring custom machining or modification.

This damper is ideal for enthusiasts rebuilding original 289 or 351W engines, street rodders, and classic car restorers who demand factory-correct balance characteristics without compromise. Installation is straightforward on any SBF platform equipped with external balance crankshafts; verify your engine's balance type before ordering to ensure proper fitment. The 28oz external balance specification must match your crankshaft configuration—internal balance engines require different damper specifications. With TRICK FLOW's reputation for precision and durability, this harmonic balancer delivers measurable reductions in crankshaft stress, allowing you to run sustained higher RPMs with confidence and protecting your investment in engine building.