What is the purpose of a crankshaft damper?

A crankshaft damper, also known as a harmonic balancer, helps to control torsional vibrations that occur in the crankshaft as the engine runs. By reducing these vibrations, it can help prevent premature wear on the crankshaft and other engine components.

What does '25 percent underdrive' mean for the accessory pulleys?

A 25 percent underdrive means that the accessory pulleys (like the alternator and water pump) will spin at 75% of the crankshaft's speed. This can reduce the load on the engine, potentially freeing up a small amount of horsepower and reducing wear on the accessories themselves.

Does this damper include any mounting hardware?

This product listing is for the ATI crankshaft damper itself. It is recommended to refer to the manufacturer's installation instructions or consult with a professional to determine if any specific hardware is required for installation beyond what is typically included with the damper.

ATI Crankshaft Damper 918847 - LS1/2/3/6 Engines

Name: ATI Damper - 5.67in - Alum - 6/4 Grv - 25 Percent UD - No A/C - LS1/2/3/6 - 97-13 Y Body - 3 Ring
Brand: ATI
Price: 459.28 USD
Availability: InStock

ATI Damper - 5.67in - Alum - 6/4 Grv - 25 Percent UD - No A/C - LS1/2/3/6 - 97-13 Y Body - 3 Ring

$459.28

ATI 5.67in aluminum crankshaft damper for LS1/2/3/6 engines. Features 6/4 groove and 25% underdrive.

Key Features

Fits LS1, LS2, LS3, and LS6 engines.
5.67-inch diameter aluminum construction.
3-ring design with 6 main pulley grooves and 4 accessory grooves.
Includes a 25 percent underdrive pulley setup.
Configured for vehicles without air conditioning.
Designed for 1997-2013 'Y Body' applications.

This crankshaft damper is designed for LS1, LS2, LS3, and LS6 engines, specifically for 'Y Body' applications from 1997 to 2013. Always confirm compatibility with your specific vehicle configuration.

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Product Details

This ATI crankshaft damper is a well-built component designed for LS1, LS2, LS3, and LS6 engines. You get the 5.67-inch aluminum damper itself, featuring a 3-ring design with 6 grooves for the main pulley and 4 grooves for accessory belts. It's set up for a 25 percent underdrive, meaning your accessory pulleys will spin slower than the crankshaft, which can reduce drag on the engine. This specific damper is configured for vehicles without air conditioning and is intended for 'Y Body' applications from 1997 to 2013.

ATI is known for making solid performance parts, and this damper is no exception. The aluminum construction helps keep weight down, while the multi-ring design is engineered to control torsional vibrations from the crankshaft. This is important because excessive vibrations can lead to premature wear on other engine components. The 25% underdrive pulley setup is a popular choice for enthusiasts looking to slightly improve accessory efficiency and reduce parasitic drag, especially in modified applications. It’s designed to fit right into place on the specified LS engines.