What is the benefit of a 4% overdrive pulley?

A 4% overdrive pulley spins your engine's accessories (like the alternator and water pump) about 4% faster than the stock pulley. This can help improve cooling system performance and ensure your alternator can keep up with higher electrical loads.

What is the difference between this and a stock harmonic balancer?

This ATI pulley is designed to be a performance replacement for your stock harmonic balancer. It's made of aluminum, features an 8-rib belt system, and provides a 4% overdrive to spin accessories faster, unlike a standard factory unit.

Does this pulley come with a new belt?

This ATI Shell Assy includes the crankshaft pulley itself. A new, compatible 8-rib serpentine belt is typically sold separately and may be required depending on the condition of your current belt and any other modifications.

Specifications

Brand: ATI
Part #: ATI917044
UPC: 800157064531

ATI Shell Assy - 7.48 - Alum - 8 Grv - Dodge 5.7L Hemi Truck - 4 Percent OD

Name: ATI Shell Assy - 7.48 - Alum - 8 Grv - Dodge 5.7L Hemi Truck - 4 Percent OD
Brand: ATI
SKU: ati-ati-shell-assy-7-48-alum-8-grv-dodge-5-7l-hemi-truck-4-percent-od-t14-361169
Price: 416.74 USD
Availability: BackOrder

$416.74

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ATI 7.48" aluminum crankshaft pulley for Dodge 5.7L Hemi trucks. 8-rib, 4% overdrive.

Key Features

Fits Dodge 5.7L Hemi trucks.
Aluminum construction for reduced weight.
8-rib design for a strong belt grip.
4 percent overdrive increases accessory speed.
7.48-inch diameter.
Direct fit replacement for the factory harmonic balancer.

This ATI crankshaft pulley is designed for Dodge 5.7L Hemi trucks. Please verify fitment for your specific vehicle application.

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About this part

Product Details

If you're looking to get a bit more out of your Dodge 5.7L Hemi truck's engine, especially for performance applications, this ATI crankshaft pulley is a solid option. It's designed to replace the factory harmonic balancer with a unit that spins the accessories a little faster, giving you a slight edge in cooling and charging system efficiency. This particular pulley is made from aluminum, which helps keep overall weight down compared to a stock steel unit.

This ATI pulley features an 8-rib design, meaning it uses a wider belt to handle increased loads, and it's a 4 percent overdrive unit. What that means in practice is that for every rotation of the engine, the accessories driven by this pulley will spin about 4% faster than they would with the stock pulley. This can help ensure your alternator is keeping up with higher electrical demands or that your water pump is moving coolant more effectively, especially if you've made other engine modifications. The 7.48-inch diameter is specific to certain applications, so double-check your fitment.

When installing this, you'll want to make sure you have the correct tools to remove the old harmonic balancer and properly seat the new ATI pulley. It's a direct replacement part, so it should fit right into place on your 5.7L Hemi truck. This is a well-built component from ATI, a company known for its performance engine parts.