ATI Performance Products 917306 - Harmonic Damper 4-Groove For L8T, L84, L87 and LV3

The patented ATI Super Damper is the only crankshaft damper designed exclusively for high performance engines.

ATI offers a variety of front drive pulleys in OEM diameter, underdriven and overdriven sizes:

Diameter % UD/OD	Grooves	Drive Diameter	Part #
10%UD	6	6.773"	916359
OEM	6	7.525"	916358
4% OD	8	7.835"	916153
10% OD	8	8.295"	916105
15.5%UD	8	8.690"	916106
30%UD	10	9.770"	916159

This damper comes with laser-etched timing marks, a single 3/16 keyway 4140 Heat Treat hub, and exceeds SFI 18.1 Certification.


OEM dampers are optimally tuned to a narrow band of “perceived normal driving conditions” and do not perform well outside of those limits. The ATI Super Damper can handle any engine speeds and driving conditions that get thrown at it to better protect your engine. ATI Super Dampers provide balanced dampening of torsional crankshaft vibrations through all RPM ranges especially during competition use.

ATI Performance Products, Inc. is located in Baltimore, MD, and specializes in producing and maintaining high performance products for street and strip applications. Over the years ATI has earned a reputation for its cutting edge technology, attention to detail, and rigorous testing under race conditions.