FAST 146074-1 LSXHR 103mm Short Velocity Stack for LS Intake Manifold

The FAST 146074-1 is a short velocity stack designed for use with the FAST LSXHR 103mm Intake Manifold. These interchangeable velocity stacks are engineered to give tuners precise control over the engine's powerband characteristics, allowing for fine-tuned performance adjustments on a per-cylinder basis.

Key Features:

• Short profile velocity stack configuration for the FAST LSXHR 103mm intake manifold
• Interchangeable design — mix and match with tall and medium stacks for cylinder-by-cylinder tuning
• Optimizes airflow characteristics to shape the powerband to specific performance goals
• Compatible with the FAST LSXHR 103mm intake manifold system
• Sold as a set for the intake manifold's runner configuration

The FAST LSXHR velocity stack system is available in three heights — tall, medium, and short — giving engine builders and tuners the flexibility to dial in throttle response, peak power, and mid-range torque. Mixing stack heights across cylinders is a proven technique for optimizing power delivery on high-performance LS-based engines.