ATI Performance Products ATI917943S Super Damper Serpentine Series Harmonic Balancer

The ATI Performance Products ATI917943S Super Damper Serpentine Series is a precision-engineered harmonic balancer (crankshaft damper) built for high-performance street and racing applications. Part of ATI's patented Super Damper lineup, this serpentine series unit features grooves for serpentine belt drive systems machined directly into the outer damper shell, making it a direct-fit solution for engines running OEM-style accessory drive configurations.

ATI Super Dampers are the only crankshaft dampers designed exclusively for high-performance engines, engineered to eliminate destructive torsional crankshaft vibrations that can cause premature engine wear or catastrophic failure at high RPM. This unit meets and exceeds SFI 18.1 certification, making it legal for NHRA and IHRA sanctioned competition.

Key Features:

• Patented Super Damper design — the only harmonic balancer built exclusively for high-RPM performance engines
• Serpentine belt grooves machined into the outer shell for OEM-style accessory drive compatibility
• Inner and outer shells in aluminum or steel housing a precision steel inertia weight
• Computer-machined grooves retain proper-durometer O-rings, dyno-tested for each application
• Tunable and rebuildable design for long service life
• SFI 18.1 certified — race legal for NHRA and IHRA competition
• Black zinc chromate finish for corrosion resistance
• Computer-controlled, laser-engraved 360-degree timing marks for precise ignition timing
• Effective across the full RPM range — equally suited for street driving and all-out racing

ATI Performance Products has been manufacturing high-performance driveline and engine components since 1961, with all products designed, tested, and manufactured at their facility outside Baltimore, Maryland. The ATI917943S is an ideal upgrade over factory dampers and non-dampened pulleys, which offer no meaningful protection for high-performance engines.