What is the main benefit of this COMP Cams camshaft?

This camshaft is COMP Cams' largest VVT option that works with stock pistons. It's designed to increase airflow and improve engine performance, especially in street and strip applications.

Does this camshaft require any other parts for installation?

While it's designed to work with stock pistons and VVT/AFM systems, it's recommended to consider additional displacement or high-RPM modifications to maximize its performance potential. Always refer to the manufacturer's installation instructions for specific requirements.

Is this camshaft legal for use in California?

No, this camshaft is not CARB approved and cannot be shipped to California due to emissions regulations.

COMP Cams Camshaft GM Gen IV LS VVT/AFM 189-428-13

Name: COMP Cams Camshaft GM Gen Iv LS VVT/AFM
Brand: COMP Cams
SKU: comp-cams-comp-cams-camshaft-gm-gen-iv-ls-vvt-afm-t14-4390903
Price: 536.44 USD
Availability: BackOrder

COMP Cams Camshaft GM Gen Iv LS VVT/AFM

$536.44

On Backorder

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

COMP Cams XFI VVT camshaft for GM Gen IV LS engines with VVT/AFM. This is their largest VVT cam compatible with stock pistons, offering improved performance.

Key Features

Fits a wide range of GM Gen IV LS VVT/AFM equipped vehicles.
COMP Cams XFI VVT camshaft with 226 intake and 236 exhaust duration.
Designed to work with factory Variable Valve Timing and Active Fuel Management systems.
Largest VVT camshaft compatible with stock pistons for improved performance.
Suitable for street and strip applications, often paired with displacement or high-RPM modifications.
Part number 189-428-13.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

COMP Cams is well-known for making performance valvetrain components, and their XFI VVT camshafts are a popular choice for GM LS engine owners looking to get more out of their Gen IV VVT/AFM equipped vehicles. This particular camshaft, part number 189-428-13, is designed to work with the factory Variable Valve Timing and Active Fuel Management systems, making it a direct upgrade for many Cadillac, Chevrolet, GMC, and Hummer models from the late 2000s and early 2010s. For instance, it fits vehicles like the Cadillac Escalade, Chevrolet Camaro, and GMC Sierra, among many others.

This is COMP Cams' largest VVT camshaft that can be installed using stock pistons, which is a notable advantage for builders aiming for significant power gains without a full engine teardown. The camshaft features a 226 intake and 236 exhaust duration, designed to increase airflow and improve engine breathing, especially at higher RPMs. While it offers substantial performance improvements for street and strip applications, it's recommended to consider additional displacement or high-RPM modifications to fully capitalize on its potential. This camshaft is a solid option for those seeking a noticeable bump in power and torque from their LS engine.

When installing this camshaft, it's important to follow the manufacturer's instructions carefully, especially regarding the VVT system and any required supporting modifications. While this camshaft is designed to work with stock pistons, it's always a good idea to verify piston-to-valve clearance, particularly if you're using aftermarket cylinder heads or other valvetrain components. This camshaft is not CARB approved and cannot be shipped to California.