• 6.2L L87
• 5.3L L84
• 4.3L LV3

This ATI 917306 Serpentine Series Super Damper is designed for GM L8T Truck and Gen V Ecotec3 applications. It features a 7.480 in. aluminum shell with a 4-groove belt drive on the outer shell. It is a direct replacement for OEM GM Part 12680364 and fits the GM 6.6L L8T crate engine, as well as the 4.3L LV3, 5.3L L84, and 6.2L L87 engines.

ATI 917306 Serpentine Super Damper Features:

• 7.480 in. Diameter
• Laser-etched 360-degree timing marks
• Single 3/16 in. keyway
• Dampens torsional crankshaft vibrations through the entire RPM range
• Includes new retaining bolt ATI 951499
• Direct replacement for OEM GM Part 12680364

ATI 917306 Serpentine Super Damper Notes:

• Requires a Bolt-On Front Pulley (each sold separately)
• ATI offers the following pulley options:
• 916359 – 6.773 in. Drive Diameter, 10% Underdrive, 6-Groove Pulley
• 916358 – 7.525 in. Drive Diameter, OEM Size, 6-Groove Pulley
• 916153 – 7.835 in. Drive Diameter, 4% Overdrive, 8-Groove Pulley
• 916105 – 8.295 in. Drive Diameter, 10% Overdrive, 8-Groove Pulley
• 916106 – 8.690 in. Drive Diameter, 15.5% Overdrive, 8-Groove Pulley
• 916159 – 9.770 in. Drive Diameter, 30% Overdrive, 10-Groove Pulley
• Any number of ribs can be used—the rear serpentine groove will always line up, and extra grooves are positioned toward the front
• If you prefer a certain size available only with more grooves than you need, it will still fit and function properly