What type of cylinder heads does this runner set fit?

This runner set is specifically designed for Cathedral Port LS1, LS2, and LS6 cylinder heads. It is intended to work with the FAST LSXR 102mm intake manifold.

What kind of performance gains can I expect?

When used with the FAST LSXR 102mm intake manifold, this runner set is designed to provide excellent added torque and horsepower. The exact gains will depend on your specific engine setup and other modifications.

Does this runner set come with the intake manifold?

No, this product is a replacement runner set for the FAST LSXR 102mm LS1 intake manifold. The intake manifold itself is sold separately.

FAST LSXR LS Intake Manifold Runner Set 146353

Name: FAST Replacement Runner Set LSXR LS
Brand: FAST
Price: 615.63 USD
Availability: InStock

FAST Replacement Runner Set LSXR LS

$615.63

On Backorder

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

FAST LSXR LS intake manifold standard runner set for Cathedral Port LS1/2/6. Boosts torque and horsepower for your LS engine.

Key Features

Fits FAST LSXR 102mm LS1 intake manifolds.
Designed for Cathedral Port LS1, LS2, and LS6 cylinder heads.
Provides improved torque and horsepower when used with the LSXR manifold.
Optimizes airflow for high-horsepower and race applications.
Fits a wide range of GM vehicles including Chevrolet and GMC models.

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Will this fit your vehicle?

Product Details

Built with a focus on airflow for high-horsepower applications, this standard runner set is specifically designed for the FAST LSXR 102mm LS1 intake manifold. These runners are intended for Cathedral Port LS1, LS2, and LS6 cylinder heads, offering an improved path for air entering your engine. When paired with the LSXR manifold, you can expect a notable increase in both torque and horsepower, making it a solid choice for performance builds.

This runner set fits a wide range of GM vehicles equipped with compatible LS engines, including popular models like the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade. The design aims to optimize airflow characteristics, contributing to the overall performance gains. It's a direct replacement for the standard runners on your LSXR manifold, ensuring a proper fit and function for your engine's intake system.

If you're looking to extract more power from your LS engine and have already installed or plan to install the FAST LSXR 102mm intake manifold, this standard runner set is a key component to consider. It's important to note that this part is not CARB approved and cannot be shipped to California.