VAC Motorsports Harmonic Damper by ATI, BMW S14

Due to space limitations, the design of this damper will overdrive your components (waterpump, power steering, and alternator) by approximately 10-13%; we highly reccomend using our underdrive pulleys in your setup

The VAC/ATI Design and Development Team brings harmonic control to the BMW S14 engine.

Controlling the harmonic resonance of the BMW S14 engine is highly important as RPMs rise, but the ideal configuration of the 4-cylinder motor makes even the most experienced engine builders overlook some fundamental principles of engine harmonics that can be destructive.

Harmonics destroy these motors by causing extensive oil pump and crankshaft damage, but the addition of VAC’s Harmonic Damper eliminates the unstable crankshaft harmonic vibrations that cause internal engine wear. By eliminating harmonic vibrations, your S14 engine will be able to produce more horsepower and torque with increased reliability.

The VAC/ATI Harmonic Damper is made with an integral pulley, eliminating the need for the additional pulley other models require.

• Exceeds SFI 18.1 Safety Certification

• Eliminates problems with lightweight clutch and flywheel assemblies

• Controls destructive harmonic forces

• Reduces instances of bearing wear, accessory failure and oil pump failure

• Includes lightweight VAC Billet Crankshaft Pulley

• Made in USA

ATI Performance Products, Inc. is located in Baltimore, MD, and specializes in producing and maintaining high performance products for street and track applications. Over the years ATI has earned a reputation for its cutting edge technology, attention to detail and rigorous testing under race conditions. We are proud to have them as an exclusive partner in these BMW applications