LSXR 102MM Race Runner Intake Manifold for LS3 Engines - 146104B

LSXR 102MM Race Runner Intake Manifold for LS3 Engines – Unleash Hidden Horsepower

Upgrade your LS3-powered build with the FAST LSXR 102mm Race Runner Intake Manifold—engineered for serious street and track performance. Developed in collaboration with the airflow experts at RHS, this intake manifold is built from lightweight, durable polymer and delivers proven horsepower gains and modular tuning flexibility.

Designed for GM LS-based engines, this manifold features a revolutionary modular design that allows quick disassembly and individual runner removal—making custom porting easier than ever. When paired with a Big Mouth 102mm throttle body, dyno tests show +16 HP gains on near-stock LS3 setups and +26 RWHP on 500 cubic-inch race builds.

Whether you're building a street machine or race car, the FAST LSXR 102MM Intake provides optimized airflow, reduced heat soak, and unmatched tuning potential—perfect for maximizing power across the RPM range.

✅ Key Features:

• Designed for LS3-based engines (cathedral port LS variants not supported)

• 102mm inlet optimized for FAST Big Mouth throttle bodies

• Modular polymer construction for lightweight strength and thermal efficiency

• Removable runners allow custom porting and tuning flexibility

• Dyno-proven gains: +16 HP on stock LS3, +26 RWHP on 500ci builds

• Perfect for high-performance street cars and full-race LS applications

Take control of your airflow, optimize your performance, and gain real-world horsepower with the FAST LSXR 102mm Intake Manifold—your next step toward LS3 domination.

This is the same intake manifold we use on our LS3 Drift Builds.

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