What is the primary benefit of this COMP Cams camshaft?

This camshaft is designed to significantly increase top-end horsepower in modified GM LS Gen IV engines. It's engineered to provide a noticeable power boost, especially in applications that retain VVT and AFM systems, when properly tuned.

What supporting modifications are recommended for this camshaft?

For optimal performance and reliability, it's recommended to use upgraded valve springs, pushrods, and potentially lifters that are compatible with the camshaft's specifications. A professional engine tune is also essential after installation.

Does this camshaft work with VVT and AFM systems?

Yes, this camshaft is specifically designed to work with GM's Variable Valve Timing (VVT) and Active Fuel Management (AFM) systems. Proper ECU tuning is required to ensure these systems function correctly with the new camshaft profile.

COMP Cams GM LS Camshaft 689-423-13

Name: COMP Cams Camshaft GM LS 358 VVT/AFM 27
Brand: COMP Cams
Price: 555.06 USD
Availability: InStock

COMP Cams Camshaft GM LS 358 VVT/AFM 27

$555.06

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 AFM camshaft for GM LS Gen IV engines. Delivers outstanding top-end power in modified applications.

Key Features

Fits a wide range of GM LS Gen IV engines, including 5.3L, 6.0L, and 6.2L applications.
Features XFI technology for improved performance and durability.
Hydraulic roller design reduces friction and wear.
Cam specifications: 224 intake duration / 236 exhaust duration at .050 lift.
115-degree lobe separation angle.
Designed for outstanding top-end power in modified VVT/AFM applications.

⚠️ 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

If you're looking to get more power out of your modified GM LS Gen IV engine, especially those with VVT and AFM systems, this COMP Cams camshaft is a solid option. It's designed to really wake up the top end of your engine, giving you that extra punch when you need it, while still being manageable for daily driving if your computer is tuned correctly. This camshaft is a popular choice for builders aiming for significant power gains in engines like the 5.3L, 6.0L, and 6.2L found in a wide range of trucks and performance cars.

This particular camshaft, the 358 VVT/AFM 27XFIA, features a 224-degree intake duration and a 236-degree exhaust duration at .050 lift, with a 115-degree lobe separation angle. This specific grind is known for its ability to produce strong horsepower numbers without completely sacrificing low-end torque, which is crucial for drivability. It's built using COMP Cams' XFI technology, which means it's made from high-strength steel and features advanced lobe profiles for improved performance and durability. It's a hydraulic roller camshaft, meaning it uses roller lifters to reduce friction and wear compared to flat tappet designs.

When installing a camshaft like this, it's important to have the right supporting components. You'll typically need new valve springs, pushrods, and potentially lifters that are matched to the camshaft's specifications to ensure optimal performance and longevity. A proper tune after installation is also essential to take full advantage of the camshaft's capabilities and to ensure the VVT and AFM systems function correctly. This camshaft is a significant upgrade for enthusiasts looking to push the performance envelope of their LS-powered vehicle.