ATI Damper - 5.67in - Alum - 6/4 Grv - 25 Percent UD - LS1/LS2 - F & V Body - 10 Per UD A/C - 1Pc

This ATI crankshaft damper is built with a 5.67-inch diameter aluminum shell, a choice that helps keep rotational mass down. It’s designed with a 6-rib, 4-rib serpentine belt groove setup, offering flexibility for accessory drives on LS1 and LS2 engines. The damper also incorporates a 25 percent underdrive pulley, which can help reduce drag on the engine by slowing down accessories like the water pump and alternator. This specific model is intended for F-body and V-body vehicles and includes provisions for a 10-rib underdrive accessory drive with air conditioning.

The construction of this damper involves a bonded design, where the outer ring and the inner hub are securely joined. This method ensures that the two parts remain in sync, even under high stress and varying temperatures, which is crucial for accurate timing and engine performance. The aluminum construction not only contributes to a lighter rotating assembly, potentially improving engine response, but also dissipates heat effectively. The 25 percent underdrive is a popular choice for enthusiasts looking to free up a small amount of horsepower and reduce accessory load, especially in modified vehicles.

When installing this damper, it's important to follow the manufacturer's recommended procedure to ensure it's properly seated and secured to the crankshaft. This part is a solid option for LS engine builds where accessory drive configuration and accessory load management are key considerations. Always refer to the manufacturer's installation guide for specific details and torque specifications.