What does a 10 percent underdrive mean for my engine?

A 10 percent underdrive means the accessories driven by the crankshaft pulley will spin 10 percent slower than the crankshaft. This can reduce the load on the engine, particularly at higher RPMs, and may help free up a small amount of horsepower.

What is the Y Body designation?

The Y Body designation indicates that this crank hub is specifically designed to fit certain GM vehicles that use the Y Body platform, ensuring proper alignment and function with the factory accessory drive system.

What material is this crank hub made from?

This crank hub is constructed from steel, which provides a strong and durable component for the engine's accessory drive system.

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Specifications

Brand: ATI
Part #: ATI916058U
UPC: 800157022692

ATI Crank Hub - Steel - LS7 Y Body 10 Percent UD

Name: ATI Crank Hub - Steel - LS7 Y Body 10 Percent UD
Brand: ATI
SKU: ati-ati-crank-hub-steel-ls7-y-body-10-percent-ud-t14-360640
Price: 148.36 USD
Availability: BackOrder

$148.36

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits LS7 Y Body applications.
Constructed from durable steel for long-term use.
Features a 10 percent underdrive design.
Helps reduce accessory load on the engine.

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About this part

Product Details

This ATI crank hub is made from steel, offering a solid foundation for your LS7 engine's accessory drive. It's designed with a 10 percent underdrive, which means the accessories driven by the crankshaft pulley will spin 10 percent slower than the crankshaft itself. This can help reduce the load on the engine, especially at higher RPMs, and can be beneficial if you're looking to free up a little horsepower or reduce accessory drag.

The Y-body designation refers to the specific design for certain GM vehicles, ensuring a proper fit and function. Using a well-built steel hub like this one helps ensure that the critical components driven by your crankshaft pulley, like the alternator and water pump, are reliably connected and spinning true. It's a straightforward component that plays an important role in the overall health and performance of your engine's accessory system.