Precision Vibration Control for High-RPM & Turbo BMW Builds

VAC / ATI Harmonic Dampers are engineered to control crankshaft torsional vibration in high-performance BMW engines operating under extreme conditions. Whether you’re building a high-RPM naturally aspirated motor or a 600–1500HP turbocharged engine, proper harmonic control is critical to engine longevity, bearing life, and valvetrain stability.

These dampers are developed in collaboration with ATI Performance Products, the industry leader in elastomer-based harmonic damping used across professional motorsports. Unlike lightweight underdrive pulleys or solid crank pulleys, ATI dampers are designed to absorb and dissipate harmful crankshaft vibrations, not amplify them.

VAC-spec ATI dampers are precision-machined, fully rebuildable, and SFI-approved for racing applications. They are trusted by professional engine builders worldwide to protect crankshafts, timing components, oil pumps, and accessory drives in engines that live at high RPM and under sustained load.

Why Harmonic Dampers Matter

As power, RPM, and cylinder pressure increase, crankshaft harmonics become more severe. Without proper damping, these vibrations can lead to:

• Premature bearing wear

• Crankshaft fatigue or failure

• Valvetrain instability

• Timing inaccuracies

• Oil pump and accessory damage

VAC / ATI Harmonic Dampers are engineered to prevent these failures by maintaining rotational stability across the entire RPM range.

Key Features

• Elastomer-based torsional vibration control

• Precision CNC-machined construction

• Fully rebuildable and serviceable design

• SFI-approved for racing applications

• Proven in turbo, stroker, and high-RPM BMW engines

Whether you’re protecting a stock crank or supporting a fully built race engine, a proper harmonic damper is not optional—it’s insurance.

Control the vibration. Protect the engine. Build with confidence.