ATI Performance Products ATI918643 Super Damper Harmonic Balancer

The ATI Performance Products ATI918643 Super Damper is a high-performance harmonic balancer engineered to eliminate destructive torsional crankshaft vibrations in high-RPM performance and racing engines. Developed exclusively for demanding applications, the ATI Super Damper exceeds SFI 18.1 specifications, making it competition-legal for NHRA and IHRA sanctioned events.

ATI's patented torsional damper design uses a precision steel inertia weight retained by computer-machined grooves and proper-durometer O-rings housed within inner and outer shells. This construction provides tunable, rebuildable vibration damping that remains highly efficient across all RPM ranges — far superior to OEM rubber-bonded harmonic balancers that degrade over time.

Key Features:

• Exceeds SFI 18.1 specifications — race and street legal
• Patented torsional damper design with steel inertia weight
• Computer-machined O-ring grooves for precise, consistent damping
• Tunable and rebuildable for long service life
• Black zinc chromate finish for corrosion resistance
• Computer-controlled laser-engraved 360-degree timing marks for precision tuning
• Designed for high-RPM performance engines (6,000+ RPM)

The ATI918643 Super Damper is part of ATI's renowned Super Damper lineup, which has been proven in Winston Cup competition over two million cycles and in drag racing applications for decades. Whether used on the street or strip, it provides reliable crankshaft protection and consistent performance that stock balancers simply cannot match.