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

• Harmonic Balancer • Serpentine Super Damper • 7.480 in OD • SFI 18.1 • Aluminum / Steel • Black • Internal Balance • GM GenV LT-Series Truck Engines (Ecotec3) • Each ATI 917306 Serpentine Super Damper Notes: Requires a bolt-on accessory drive front pulley Direct replacement for GM 12680364 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.