ATI Performance Products ATI916421L Super Damper Harmonic Balancer

The ATI Performance Products ATI916421L Super Damper is a high-performance harmonic balancer/crankshaft damper engineered to reduce harmful torsional vibration in high-performance and racing engines. ATI's Super Damper line is the industry standard in professional motorsports, offering superior vibration damping over stock rubber-bonded units through its proven elastomer tuning technology.

Unlike OEM harmonic balancers that rely on a bonded rubber ring that degrades over time and at high RPM, the ATI Super Damper uses precision-machined, inertia-ring-based design that remains effective across a wide RPM range and under demanding race conditions. The result is improved engine longevity, more stable ignition timing, and protected rotating assembly components.

Key Features:

• Precision-machined billet steel or aluminum construction for strength and durability
• Elastomer-tuned inertia ring design for effective torsional vibration damping
• SFI 18.1 certified for sanctioned racing applications
• Timing marks clearly engraved for accurate ignition timing
• Compatible with ATI's modular pulley system for easy accessory drive setup
• Serviceable and rebuildable design for long-term cost-effectiveness
• Designed for high-RPM performance and racing environments

ATI Super Dampers are a trusted upgrade for performance street builds, drag racing, road racing, and circle track applications where protecting the crankshaft and rotating assembly is critical. Verify SFI requirements and fitment specifications with ATI's application guide before installation.