302/351C SFI Crankshaft Damper- 28 Oz.

The Ford 302/351C SFI Crankshaft Damper — 28 Oz. is a harmonic balancer engineered for small-block Ford engines running modified or high-performance configurations. This SFI 18.1-certified damper manages crankshaft vibration with precision, protecting internal engine components and extending durability during sustained power delivery. The 28-ounce external balance specification targets engines with specific rotating assembly configurations, making fitment critical to proper engine operation.

Built from steel with a clear powder-coat finish, this damper delivers corrosion resistance alongside structural integrity. The 6.610-inch outer diameter integrates with standard 302 and 351C small-block configurations, while the SFI 18.1 certification confirms compliance with high-performance motorsports safety standards. Harmonic balancers operate under extreme centrifugal loads; the damper's inertia ring and elastomer design absorb torsional vibration, reducing stress on the crankshaft, main bearings, and timing chain. For street performance, bracket racing, or engine rebuilds requiring OEM-equivalent reliability, proper damper selection is non-negotiable.

This component is essential for builders restoring 302 or 351C engines to factory specifications or transitioning to modified power levels. Whether supporting a carbureted street engine, a fuel-injected restomod, or a race application within its balance window, the damper maintains critical crankshaft alignment and vibration control. The 28-ounce balance stamp requires verification against your specific engine configuration; incorrect balance weight can cause harmful vibration, premature wear, and catastrophic failure at high RPM.