Professional Products 90006 PowerForce Plus Harmonic Damper 6.4" SFI 18.1 Early Small Block Ford 28 oz

The Professional Products 90006 PowerForce Plus harmonic damper is an SFI 18.1 certified performance balancer designed specifically for early small block Ford engines (1963-1969). This 6.4-inch diameter damper features a 28 ounce-inch external balance configuration that matches stock specifications while delivering superior performance and durability.

Key Features:

• SFI 18.1 certified for racing and high-performance street applications
• Advanced elastomer bonding process creates a stronger bond between the inertia ring and hub
• Dual bolt pattern with both 3-bolt and 4-bolt accessory pulley mounting for compatibility with early and late serpentine drive systems
• Removable counterweight allows conversion to neutral balance configuration if needed
• Clear white timing marks on black painted background for easy timing adjustment (40 degrees BTDC to TDC)
• Precision balanced to tighter tolerances than original equipment specifications
• Steel construction with elastomer damping element for maximum durability
• Matches stock early Ford damper dimensions including 3-inch short length for proper chassis clearance

This damper is engineered to fit Ford 260, 289, and 351W engines, providing excellent vibration damping for both racing and high-performance street builds. The improved adhesive formulation and stronger elastomer ensure reliable operation even at elevated RPM levels.