Watch in action

The Ultimate Tunnel Ram for LS Engines

Take your engine's performance to the next level with the FAST LSXHR 103mm Tunnel Ram Intake Manifold. Designed for both naturally aspirated and boosted applications, this manifold is the industry's first polymer tunnel ram. It offers the unique ability to swap velocity stacks of varying lengths, allowing racers to fine-tune their power band for specific track conditions and engine configurations.

Performance-Driven Engineering

• Removable velocity stacks allow for custom runner length tuning.
• Optimized for massive power gains between 5,000 and 7,500 RPM.
• Polymer construction eliminates power-robbing heat soak common in aluminum.
• Compatible with rectangular port LS3 and raised rectangular port LS7 heads.
• Lightweight design contributes to a better power-to-weight ratio.

Testing has shown significant horsepower increases over traditional aluminum tunnel ram designs, making the LSXHR a must-have for serious competitors. The modular nature of this manifold means you can experiment with different stack combinations to find the perfect setup for your vehicle. Whether you are running a high-boost drag setup or a high-revving circuit engine, the LSXHR provides the airflow and thermal efficiency required for top-tier results. Upgrade your induction system with the industry-leading technology found at GGCRACING.