What is the benefit of using an 8-groove pulley?

An 8-groove pulley offers more surface area for the supercharger belt to grip compared to a 6-groove pulley. This helps prevent belt slippage, especially under higher boost conditions, ensuring more consistent power delivery.

Does this pulley come with a new supercharger belt?

This product listing is for the ATI supercharger pulley (part number ATI916153) only. A new, compatible supercharger belt may be required depending on your vehicle's current setup and the desired boost level, and is sold separately.

What other modifications might be needed when installing this pulley?

Increasing boost pressure with a smaller pulley often requires supporting modifications such as an upgraded fuel system and a tune to optimize performance and ensure engine safety. Refer to the manufacturer's installation guide for specific recommendations.

Specifications

Brand: ATI
Part #: ATI916153
UPC: 800157054396

ATI Pulley - Supercharger - 7.99 - 8 Grv - 09-15 - CTS-V LSA - OEM Size

Name: ATI Pulley - Supercharger - 7.99 - 8 Grv - 09-15 - CTS-V LSA - OEM Size
Brand: ATI
SKU: ati-ati-pulley-supercharger-7-99-8-grv-09-15-cts-v-lsa-oem-size-t14-360700
Price: 233.50 USD
Availability: BackOrder

$233.50

On Backorder — Expected to ship by May 3, 2026

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

Key Features

Fits 2009-2015 Cadillac CTS-V with LSA engine.
7.99 inch diameter is OEM size for the supercharger snout.
8-groove design provides strong belt grip for consistent boost.
Constructed from durable aluminum for a lightweight yet solid build.
Designed to increase supercharger speed and boost pressure.

This pulley is specifically designed for the 2009-2015 Cadillac CTS-V with the LSA engine. Please verify fitment for your specific vehicle application.

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About this part

Product Details

If you're looking to get more out of your supercharged LSA engine in your 2009-2015 Cadillac CTS-V, a smaller supercharger pulley is a common way to increase boost. This 7.99-inch, 8-groove pulley from ATI is designed to be an OEM size replacement, meaning it fits the factory supercharger snout without modification.

ATI is known for making well-built performance components, and this pulley is no exception. It's constructed from strong aluminum for a good balance of durability and weight savings, and the 8-groove design ensures solid belt grip, which is crucial for consistent boost delivery. This pulley is a popular choice for LSA owners looking to make a noticeable improvement in horsepower and torque by spinning the supercharger faster.

When installing a smaller supercharger pulley, it's important to ensure your belt system can handle the increased load and that your supercharger belt is in good condition. Always refer to the manufacturer's installation instructions for specific details and recommended practices.